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Prepositions after adjectives

Synonymous with different prepositions

Synonymous is normally followed by with when two things have the same meaning or are closely associated. Other prepositions are uncommon or incorrect in this pattern.

Quick answer

Which preposition goes with synonymous?

Use synonymous with to show that two words, ideas, or qualities are equivalent or strongly associated. Synonymous to, for, and in are usually not standard combinations after synonymous.

In many cultures, success is synonymous with wealth.
The term is almost synonymous with innovation.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
synonymous with + noun

Showing equivalent meaning or association

Synonymous with is the standard pattern for words, ideas, qualities, and reputations.

The brand is synonymous with luxury.
In this field, accuracy is synonymous with professionalism.
2
become synonymous with + concept

Describing strong public association

This pattern is common when a person, place, or thing becomes strongly linked with an idea.

Her name became synonymous with reform.
The city is synonymous with jazz music.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
synonymous with
Efficiency is synonymous with good planning.
standard expression for equivalent meaning or close association
synonymous to
This term is synonymous to that one.
generally nonstandard in modern English; use synonymous with
synonymous for
The brand is synonymous for quality.
incorrect in this pattern; use synonymous with
synonymous in
The two words are synonymous in some contexts.
in introduces the context where the similarity applies, not the fixed adjective pattern

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using synonymous to

Modern English strongly prefers synonymous with.

✕ The phrase is synonymous to freedom. ✓ The phrase is synonymous with freedom.

Using for after synonymous

For is not the standard preposition with synonymous.

✕ The company is synonymous for reliability. ✓ The company is synonymous with reliability.

Confusing synonymous with identical

Synonymous can mean closely associated, not always exactly the same.

✓ In advertising, the brand became synonymous with luxury.

Forgetting the context phrase with in

In may introduce a context after the main pattern.

✕ These terms are synonymous in each other. ✓ These terms are synonymous with each other in legal writing.

Quick practice

Choose the expression that matches the intended meaning.

1. Her name is synonymous ___ excellence.
2. The two terms are synonymous ___ academic writing.
3. The company became synonymous ___ innovation.

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Frequently asked questions

Is synonymous to correct?

It is usually considered nonstandard in current English. Synonymous with is preferred.

Can synonymous with describe associations, not just meanings?

Yes. It often describes strong cultural or public associations.

Why do people use in after synonymous?

In usually introduces a context, such as a field, language variety, or situation.

sacred-to-in-by-of, for "sad for" or "sad about"? "safe for", "safe from" or "safe in"? sanguine about, in, of, on or for? "satisfactory to" or "satisfactory for"? satisfied with, of, by, in or on? "satisfying for" or "satisfying to"? scarce in, for, at, on or of? scared of, to, about, for or by? "scary for" or "scary to"? "scathing about", "scathing in" or "scathing of"? "sceptical about" or "sceptical of"?

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