The word that is one of the most common and useful words in English. However, it can perform several different grammatical jobs. It can introduce a clause, point to a particular person or thing, refer back to something already mentioned, or act as a relative pronoun.
Understanding that synonyms is therefore different from learning synonyms for an ordinary descriptive word. There is no single replacement for that in every sentence. The best alternative depends on its grammatical function and the meaning it expresses.
For students, ESL learners, writers, and content creators, learning these alternatives can improve grammar awareness and sentence variety. It can also help you avoid awkward repetition while keeping your writing clear and natural.
What Does That Mean?
Simple Meaning of That
That has several major uses in English.
It can point to something:
That car is expensive.
It can introduce a clause:
I know that she is busy.
It can refer to a person or thing:
The book that I bought was interesting.
It can also replace a previously mentioned noun or idea:
I don’t want that.
Because that has multiple functions, there is no universal synonym for it.
Tone and Usage of That
The word that is neutral and extremely common. It appears in casual conversations, formal writing, academic work, journalism, and professional communication.
When finding an alternative, you first need to determine whether that is being used as a determiner, pronoun, conjunction, or relative pronoun.
30 That Synonyms and Related Alternatives
1. Which
Meaning: Used to refer to a thing or idea, especially in a relative clause.
Example sentence: The book that I borrowed was excellent.
Best usage context: Useful in some relative-clause structures, especially when referring to things.
2. Who
Meaning: Used to refer to a person in a relative clause.
Example sentence: The teacher that helped me was very kind.
Best usage context: Can replace that in many relative clauses when referring to people.
3. Whom
Meaning: A formal relative pronoun used for a person receiving an action.
Example sentence: The person whom you contacted will respond soon.
Best usage context: Formal or traditional writing.
4. This
Meaning: Used to point to a particular person, thing, or idea that is relatively near or currently being discussed.
Example sentence: This book is easier to understand than the other one.
Best usage context: Useful when replacing that as a demonstrative with something closer to the speaker or discussion.
5. It
Meaning: A pronoun used to refer to a thing, situation, or idea already known.
Example sentence: I saw the car, and it was damaged.
Best usage context: Useful when changing a demonstrative reference into an ordinary pronoun.
6. The One
Meaning: Refers to a specific person or thing already identified.
Example sentence: I want the one on the top shelf.
Best usage context: Useful when that one identifies a particular item.
7. The Specific One
Meaning: A particular person or thing among several choices.
Example sentence: I was looking for the specific one you mentioned.
Best usage context: Useful when emphasizing exact identification.
8. Such
Meaning: Of the type or kind already mentioned or understood.
Example sentence: Such behavior is not acceptable.
Best usage context: Formal writing and situations where that kind of is intended.
9. Such a
Meaning: Used to refer to something of a particular type or degree.
Example sentence: Such a mistake should not happen again.
Best usage context: Formal and descriptive writing.
10. The Said
Meaning: Referring to something already mentioned.
Example sentence: The said document must be submitted by Friday.
Best usage context: Formal, legal, or old-fashioned writing; usually unnecessary in everyday English.
11. The Aforementioned
Meaning: Referring to something already mentioned earlier.
Example sentence: The aforementioned report contains the requested information.
Best usage context: Formal and academic writing.
12. The Previously Mentioned
Meaning: Referring to something discussed earlier.
Example sentence: The previously mentioned problem requires further investigation.
Best usage context: Formal explanatory writing.
13. Which One
Meaning: Identifies a particular option or item.
Example sentence: Which one would you like?
Best usage context: Useful when that one refers to a choice.
14. That Particular
Meaning: Refers to one specific person, thing, or situation.
Example sentence: I remember that particular conversation clearly.
Best usage context: Useful when emphasizing specificity.
15. The Same
Meaning: Refers to something already identified as identical or unchanged.
Example sentence: She ordered the same meal as before.
Best usage context: Useful when emphasizing identity or repetition.
16. The Mentioned
Meaning: Referring to something previously discussed.
Example sentence: The mentioned issue will be reviewed tomorrow.
Best usage context: Formal writing, though mentioned above or a specific noun is often more natural.
17. The Relevant
Meaning: The particular thing connected to the current subject.
Example sentence: Please attach the relevant document.
Best usage context: Professional and academic writing.
18. The Identified
Meaning: Referring to something previously specified or recognized.
Example sentence: The identified problem was corrected immediately.
Best usage context: Technical and professional writing.
19. The Particular
Meaning: A specific person, thing, or example.
Example sentence: The particular example you selected is useful.
Best usage context: Useful when that emphasizes specificity.
20. Which
Meaning: Refers to a specific thing among alternatives or within a relative clause.
Example sentence: The project, which started in June, is nearly finished.
Best usage context: Relative clauses and formal writing.
21. Who
Meaning: Refers to a person in a relative clause.
Example sentence: The woman who called earlier left a message.
Best usage context: Natural modern English for people.
22. Whatever
Meaning: Anything or everything of the kind being discussed.
Example sentence: Choose whatever option works best for you.
Best usage context: When the exact choice is not important or is unrestricted.
23. Whichever
Meaning: Any one of a limited set of choices.
Example sentence: Choose whichever color you prefer.
Best usage context: Useful when selecting from known alternatives.
24. The Fact That
Meaning: The circumstance or reality that something is true.
Example sentence: The fact that he apologized helped resolve the problem.
Best usage context: Formal and explanatory writing.
25. The Idea That
Meaning: Refers to a particular thought, belief, or concept.
Example sentence: The idea that everyone deserves equal treatment is widely supported.
Best usage context: Essays, analysis, and discussions of beliefs.
26. The Claim That
Meaning: Refers to a statement or assertion that something is true.
Example sentence: The claim that the product is completely safe requires evidence.
Best usage context: Academic, journalistic, and analytical writing.
27. The View That
Meaning: Refers to an opinion or belief.
Example sentence: She disagreed with the view that the policy was ineffective.
Best usage context: Academic and formal discussion.
28. The Notion That
Meaning: Refers to an idea or belief, often one being examined or questioned.
Example sentence: The notion that success happens overnight is misleading.
Best usage context: Formal, analytical, and literary writing.
29. The Belief That
Meaning: Refers to an idea someone accepts as true.
Example sentence: The belief that hard work matters remains important to many people.
Best usage context: Essays, opinion writing, and academic discussion.
30. The Reason That
Meaning: Refers to the explanation for why something happens.
Example sentence: The reason that she left early was never explained.
Best usage context: Formal explanations, though the reason why is also common.
That Synonyms Comparison Guide
Because that has several grammatical functions, its alternatives vary considerably.
| Alternative | Main Idea | Tone | Best For |
|---|---|---|---|
| Which | Refers to a thing in a relative clause | Neutral/Formal | Objects, ideas |
| Who | Refers to a person | Neutral | People |
| Whom | Formal person reference | Formal | Traditional writing |
| This | Points to something nearer | Neutral | Demonstratives |
| It | Refers to a known thing or idea | Neutral | Pronouns |
| The one | Identifies a specific item | Neutral | Choices |
| Such | Refers to a type or kind | Formal | Descriptions |
| Aforementioned | Refers to something previously mentioned | Formal | Academic/legal |
| Previously mentioned | Points back in a text | Formal | Reports, essays |
| That particular | Emphasizes specificity | Neutral | People, things |
| The same | Shows identity or repetition | Neutral | Comparison |
| The relevant | Identifies what applies | Professional | Business, academic |
| Whatever | No specific choice | Neutral | Open choices |
| Whichever | One of several choices | Neutral | Selection |
| The fact that | Refers to a reality | Formal | Explanations |
| The idea that | Refers to a concept | Formal | Essays |
| The claim that | Refers to an assertion | Formal | Analysis |
| The view that | Refers to an opinion | Formal | Academic writing |
| The notion that | Refers to an idea | Formal | Analysis |
| The belief that | Refers to a belief | Formal | Discussion |
How to Choose the Right Synonym
When That Refers to a Person
Use who or, in more formal structures, whom.
For example:
The student that won the prize was excited.
can become:
The student who won the prize was excited.
In modern English, who is usually the natural choice when referring to a person.
When That Refers to a Thing
Use which in many relative-clause structures.
For example:
The laptop that I bought is fast.
can often become:
The laptop which I bought is fast.
The exact grammar can depend on the structure and style of the sentence.
When That Points to Something
Use this, it, the one, or that particular depending on whether you mean something nearby, something already known, or one specific item.
When That Means “That Kind Of”
Use such when the intended meaning is about a type, quality, or kind.
For example:
That behavior is unacceptable.
may become:
Such behavior is unacceptable.
The sentence changes slightly in emphasis, so context matters.
When That Refers Back to Earlier Information
Use the aforementioned, previously mentioned, or the relevant in formal writing.
However, these phrases can sound unnecessarily formal. A clear noun or pronoun is often better.
When That Introduces an Idea
Use phrases such as the fact that, the idea that, the claim that, the view that, or the belief that when you want to explain exactly what the clause represents.
When You Mean Any Choice
Use whatever when the choice is completely open.
Example:
Take that you want. ❌
A natural alternative would be:
Take whatever you want. ✅
When You Mean One Choice From Several
Use whichever.
Example:
Choose whichever option you prefer.
When You Want Simple English
For ESL learners, this, it, which, who, the one, and such are among the easiest alternatives to understand.
That vs. Which
That
In a relative clause, that can refer to people or things in many structures.
Example:
The book that I bought was expensive.
Which
Which commonly refers to things.
Example:
The book which I bought was expensive.
In many contexts, both can be grammatically possible. Style and sentence structure determine the preferred choice.
That vs. Who
That
Can refer to a person in a relative clause:
The man that called me was polite.
Who
Is generally more natural when referring to people:
The man who called me was polite.
For careful modern writing, who is often preferred for people.
That vs. This
That
Often points to something farther away, previously mentioned, or viewed as separate from the speaker.
This
Often points to something closer, current, or more immediately connected to the speaker or discussion.
Compare:
That idea is interesting.
This idea is interesting.
The difference is mainly about distance or focus.
That vs. It
That
Can point to a specific thing or identify something.
It
Normally refers back to a known noun, situation, or idea.
For example:
I saw that car. It was beautiful.
Here, that identifies the car, while it refers back to it.
That vs. The Fact That
That
Can introduce a clause:
I know that she is right.
The Fact That
Emphasizes that something is a reality:
The fact that she apologized surprised everyone.
These structures are related, but they perform different grammatical roles.
That vs. Such
That
Can point to a particular example.
Such
Refers more generally to a type or kind.
Compare:
That behavior was unacceptable.
Such behavior was unacceptable.
The first points to a particular behavior, while the second refers to behavior of that type.
Why Use That Synonyms?
Using alternatives to that can sometimes make writing more specific, but it is important not to replace it simply for the sake of variety.
For example:
- That person → the person in question
- That book → the specific book
- The fact that → the reality that
- The idea that → the concept that
- The claim that → the assertion that
- The view that → the opinion that
- That kind of behavior → such behavior
The best alternative should make the meaning clearer rather than make the sentence unnecessarily complicated.
Common Uses of That Synonyms
In Academic Writing
Use which, the fact that, the view that, the claim that, and the notion that when introducing ideas and analysis.
In Professional Writing
Phrases such as the relevant, the identified, the previously mentioned, and the fact that can be useful when clarity and precision are important.
In Everyday English
this, it, which, who, the one, and such are more natural and easier to understand.
In Formal Writing
aforementioned, pertaining to the issue, the fact that, and the aforementioned can appear in formal documents, but they should be used carefully because they can make writing sound unnecessarily stiff.
In Choice-Based Sentences
Use whatever or whichever when discussing unrestricted or limited choices.
Important Grammar Note About “That”
That as a Demonstrative Determiner
In:
That house is beautiful.
That identifies a specific house.
That as a Pronoun
In:
I don’t want that.
That stands alone and refers to something understood from the context.
That as a Conjunction
In:
I think that she is right.
That introduces a clause.
That as a Relative Pronoun
In:
The book that I bought was expensive.
That connects the noun book to the relative clause.
Understanding these four functions is essential because each one has different possible alternatives.
FAQs
What is the closest synonym for that?
There is no single synonym for that. Depending on its use, alternatives may include this, it, which, who, such, or longer phrases such as the fact that.
Is “which” a synonym for “that”?
Sometimes. In relative clauses referring to things, which can often replace that, but the two words are not interchangeable in every grammatical structure.
Can “who” replace “that”?
Yes, in many relative clauses when that refers to a person.
What is a simple synonym for that?
Depending on meaning, this, it, which, or the one can be related alternatives.
Is “such” the same as “that”?
No. Such usually refers to a type or kind, while that often identifies a particular thing.
What is a formal alternative to “that”?
Depending on the sentence, phrases such as the aforementioned, the fact that, the view that, or the previously mentioned may be suitable.
Can “that” be removed from a sentence?
Sometimes. In some clauses, that can be omitted without changing the meaning.
Example:
I think that she is right.
can become:
I think she is right.
However, omission is not possible in every grammatical structure.
What is the difference between “that” and “this”?
Both are demonstratives, but this generally points to something closer or more immediate, while that often points to something farther away or already discussed.
Conclusion
Understanding that synonyms requires attention to grammar because that performs several different functions in English. Unlike ordinary vocabulary words, it cannot be replaced by one universal synonym.
Use who for people in relative clauses, which for things in many relative-clause structures, and this or it when changing the way a particular reference is expressed. Choose such when you mean a type or kind, and whatever or whichever when discussing choices.
In formal and academic writing, expressions such as the fact that, the idea that, the claim that, and the view that can make the relationship between an idea and its clause clearer.
The key is to identify what that is doing in the sentence before choosing an alternative. When grammar, meaning, and tone all match, your writing becomes clearer, smoother, and more natural.
Julian Luke is a passionate grammar and language writer at Synolexes. He simplifies complex grammar rules, vocabulary, and writing concepts, helping learners improve their English communication skills with confidence.
