Fit vs Suit

When to use each in English, with meaning, register, and examples.

Fit

Top 1,000 (very common)A2verb

Suit

Top 2,000 (common)A2noun
Most common: Fit
 FitSuit
Pronunciation🇬🇧 /["/fɪt/","/fɪts/","/ˈfɪtɪd/","/ˈfɪtɪŋ/"]/🇺🇸 /["/fɪt/","/fɪts/","/ˈfɪtɪd/","/ˈfɪtɪŋ/"]/🇬🇧 /["/suːt/"]/🇺🇸 /["/suːt/"]/
MeaningTo be the right size or shape for something.A set of clothes, usually a jacket and pants, worn together.
ExampleI need to fit this new sofa into my living room.He wore a new suit to the wedding.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA2A2
Part of speechverbnoun
Collocationsclosely, neatly, nicely, be designed to, in, into, onto, closely, neatly, nicely, be designed to, in, into, onto, perfectly, seamlessly, for, with, perfectly, seamlessly, for, withdesigner, elegant, immaculate, coat, jacket, pants, in a suit, a suit and tie, a suit of armour/​armor, a suit of clothes, designer, elegant, immaculate, coat, jacket, pants, in a suit, a suit and tie, a suit of armour/​armor, a suit of clothes, civil, class-action, paternity, bring, file, be involved in, in a/​the suit, suit against, suit over
Antonymsmiss, squeeze, misfitcasual wear, informal attire
Common mistakes'Fit' is often confused with 'fitted' — 'fit' describes the state, 'fitted' describes the act of making something fit., Some learners forget to use the preposition 'into' when discussing fitting in a space (e.g., 'fit into the box')., Using 'fit' as a noun instead of a verb can lead to confusion, as it mainly functions as a verb.Confused with 'suite', which refers to a set of rooms., Using 'suit' to refer to clothing that isn't a matching set., Incorrectly saying 'suits' when discussing a single outfit.
Usage notesUse 'fit' when discussing whether something matches well or is suitable. It's neutral, so it can be used in both casual and formal conversations. Avoid using it when discussing emotional or abstract concepts; it’s more about physical or practical suitability.Used in both formal and casual contexts. Suitable for business, weddings, and formal events, but may feel out of place in casual settings. Be careful not to confuse 'suit' with 'suit up', which means to dress formally.

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Fit

Frequently asked questions: Fit vs Suit

What's the difference between Fit and Suit?

Fit: To be the right size or shape for something. Suit: A set of clothes, usually a jacket and pants, worn together.

Which is more common: Fit and Suit?

Fit is the most common in everyday English.

Are Fit and Suit the same CEFR level?

Fit: A2, Suit: A2 on the CEFR scale.

What part of speech are Fit and Suit?

Fit: verb, Suit: noun.

Can you show an example of each?

Fit: I need to fit this new sofa into my living room. Suit: He wore a new suit to the wedding.

Can I use Fit and Suit interchangeably?

Not always. Fit and Suit are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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