Boy vs Guy

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

Boy

Top 1,000 (very common)A1noun

Guy

InformalTop 1,000 (very common)A2noun
Most formal: Boy
 BoyGuy
Pronunciation🇬🇧 /["/bɔɪ/"]/🇺🇸 /["/bɔɪ/"]/🇬🇧 /["/ɡaɪ/"]/🇺🇸 /["/ɡaɪ/"]/
MeaningA young male child or teenager.A man or a boy.
ExampleThe boy played soccer with his friends after school.The guy at the coffee shop always remembers my order.
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA1A2
Part of speechnounnoun
Collocationsbig, little, small, have, big, little, small, havedecent, friendly, funny
Antonymsgirl, womangirl, woman
Common mistakesConfused with 'girl' as the opposite gender, Overused in contexts where 'man' is more appropriate for older males, Used in plural as 'boy's' instead of 'boys'Used 'guy' for a girl, which is less common., Confused with 'guy's' as a possessive instead of just a noun., Overused in formal situations.
Usage notesUsed to refer to a child or teenager, typically under the age of 18. In formal contexts, refer to 'young man’ or 'male child'.Used in casual conversations. Avoid in formal writing or speeches. Can refer to people in general, not just males, in very informal contexts.

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Boy
Guy

Frequently asked questions: Boy vs Guy

What's the difference between Boy and Guy?

Boy: A young male child or teenager. Guy: A man or a boy.

Which is more formal: Boy and Guy?

Boy is the most formal of these.

Which is more advanced: Boy and Guy?

Guy is the highest level, at A2, on the CEFR scale.

Are Boy and Guy the same CEFR level?

Boy: A1, Guy: A2 on the CEFR scale.

What part of speech are Boy and Guy?

Boy: noun, Guy: noun.

Can you show an example of each?

Boy: The boy played soccer with his friends after school. Guy: The guy at the coffee shop always remembers my order.

Can I use Boy and Guy interchangeably?

Not always. Boy and Guy 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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