Companion vs Mate

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

Companion

Top 2,000 (common) C1 noun

Mate

Informal Top 2,000 (common) B2 noun

Most formal: Companion

	Companion	Mate
Pronunciation	🇬🇧 /["/kəmˈpænjən/"]/ 🇺🇸 /["/kəmˈpænjən/"]/	🇬🇧 /["/meɪt/"]/ 🇺🇸 /["/meɪt/"]/
Meaning	A friend or someone you spend time with.	A friend or companion.
Example	She brought her trusty companion on the hiking trip to explore the mountains together.	He's my best mate from university.
Register	Neutral	Informal
How common	Top 2,000 (common)	Top 2,000 (common)
CEFR level	C1	B2
Part of speech	noun	noun
Collocations	agreeable, boon, charming, animal, companion for, companion to, agreeable, boon, charming, animal, companion for, companion to	best, good, have, potential, prospective, ideal, attract, find, choose
Antonyms	enemy, rival, loner	enemy, rival
Common mistakes	Using 'companion' to refer to a business associate instead of a personal friend., Confusing 'companion' with 'partner' in all contexts., Using 'companions' inappropriately in singular contexts.	Confused with 'mate' as a verb – remember it's mostly a noun., Overusing it in formal situations., Misunderstanding its regional use; not common in all English-speaking countries.
Usage notes	Commonly used for pets, friends, or people who accompany you. Not often used in a formal context. Avoid using it to refer to someone you don't have a close relationship with.	Used mainly in casual conversations, especially in British English or Australian English. It may be less appropriate in formal settings. Avoid using with strangers in professional contexts.

See it in real clips

Ted Lasso › S1 E1

Mate, you are a legend for doing something so stupid.

Band Of Brothers › S1 E1

See you, mate.

Ted Lasso › S1 E1

Oi, mate. This you?

Ted Lasso › S1 E1

Mate, you are a legend for doing something so stupid.

Band Of Brothers › S1 E1

See you, mate.

Mate

Frequently asked questions: Companion vs Mate

What's the difference between Companion and Mate?

Companion: A friend or someone you spend time with. Mate: A friend or companion.

Which is more formal: Companion and Mate?

Companion is the most formal of these.

Which is more advanced: Companion and Mate?

Companion is the highest level, at C1, on the CEFR scale.

Are Companion and Mate the same CEFR level?

Companion: C1, Mate: B2 on the CEFR scale.

What part of speech are Companion and Mate?

Companion: noun, Mate: noun.

Can you show an example of each?

Companion: She brought her trusty companion on the hiking trip to explore the mountains together. Mate: He's my best mate from university.

Can I use Companion and Mate interchangeably?

Not always. Companion and Mate 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.