Onion vs Vegetable

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

Onion

Top 2,000 (common)A1noun

Vegetable

Top 1,000 (very common)A1noun
Most common: Vegetable
 OnionVegetable
Pronunciation🇬🇧 /["/ˈʌnjən/"]/🇺🇸 /["/ˈʌnjən/"]/🇬🇧 /["/ˈvedʒtəbl/"]/🇺🇸 /["/ˈvedʒtəbl/"]/
MeaningA round vegetable with a brown skin that makes you cry when you cut it.A type of plant that people eat, usually not sweet.
ExampleChop the onions finely.The children don't eat enough **fresh vegetables**.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelA1A1
Part of speechnounnoun
Collocationsraw, caramelized, pickled, chop, peel, slice, ring, soup, dip, cheese and onion, sage and onionfresh vegetables, cooked vegetables, vegetable garden
Antonyms-fruit, meat
Common mistakesConfused with 'shallot', which is a smaller, sweeter onion., Sometimes misspelled as 'onoin'., Mistakenly think all onions are the same; there are many types.Confused with 'fruit' — some fruits are often categorized as vegetables., Incorrectly pluralizing as 'vegetables' when referring to a single type., Using 'vegetable' to describe processed plant foods, which isn't always correct.
Usage notesUse 'onion' when talking about cooking or food. It's commonly used in recipes. In more informal contexts, it can also be a term for people who have many layers in personality.The term 'vegetable' is widely used in everyday conversation and writing. It is appropriate in both casual and formal contexts. However, in scientific or culinary contexts, specific names of vegetables may be preferred.

Frequently asked questions: Onion vs Vegetable

What's the difference between Onion and Vegetable?

Onion: A round vegetable with a brown skin that makes you cry when you cut it. Vegetable: A type of plant that people eat, usually not sweet.

Which is more common: Onion and Vegetable?

Vegetable is the most common in everyday English.

Are Onion and Vegetable the same CEFR level?

Onion: A1, Vegetable: A1 on the CEFR scale.

Can I use Onion and Vegetable interchangeably?

Not always. Onion and Vegetable 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.