Combination vs Union

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

Combination

Top 2,000 (common)B2noun

Union

Top 2,000 (common)B1noun
 CombinationUnion
Pronunciation🇬🇧 /["/ˌkɒmbɪˈneɪʃn/"]/🇺🇸 /["/ˌkɑːmbɪˈneɪʃn/"]/🇬🇧 /["/ˈjuːniən/"]/🇺🇸 /["/ˈjuːniən/"]/
MeaningA mix of different things together.A group of people or organizations joined together for a common purpose.
ExampleThe combination of colors in her painting is truly remarkable.The labor union negotiated better wages for its members.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2B1
Part of speechnounnoun
Collocationsideal, perfect, right, in combination (with), combination of, ideal, perfect, right, in combination (with), combination oflabor, trade, trades, form, organize, set up, be affiliated to something, represent somebody/​something, negotiate (something), confederation, federation, movement, close, loose, full, create, form, dissolve, union between, union with, civil, legal, holy, allow, recognize
Antonymsseparation, divisiondisunion, division, separation
Common mistakesConfused with 'combine' as a verb., 'Combination' used as a verb instead of a noun., Misplacing the stress on the wrong syllable: 'COM-bin-a-tion' instead of 'com-BI-na-tion'.Confusing with 'unit', which means one part of something., Using 'unions' incorrectly in singular contexts., Mispronouncing the word, especially the 'u' sound.
Usage notesUsed in both formal and informal contexts. Commonly seen in discussions about recipes, math, and combinations of different concepts. Avoid in casual conversations when a simpler word like 'mix' would suffice.Used in contexts like labor unions or political unions. It's appropriate in formal discussions or writing. Avoid using it in casual conversation unless referring to a specific organization.

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Combination

Frequently asked questions: Combination vs Union

What's the difference between Combination and Union?

Combination: A mix of different things together. Union: A group of people or organizations joined together for a common purpose.

Which is more advanced: Combination and Union?

Combination is the highest level, at B2, on the CEFR scale.

Are Combination and Union the same CEFR level?

Combination: B2, Union: B1 on the CEFR scale.

What part of speech are Combination and Union?

Combination: noun, Union: noun.

Can you show an example of each?

Combination: The combination of colors in her painting is truly remarkable. Union: The labor union negotiated better wages for its members.

Can I use Combination and Union interchangeably?

Not always. Combination and Union 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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