mate vs duet

mate and duet both are nouns.

Word	Noun	Adjective	Verb	Adverb
mate	Yes	No	Yes	No
duet	Yes	No	No	No

mate (noun)	duet (noun)
a chess move constituting an inescapable and indefensible attack on the opponent's king	(ballet) a dance for two people (usually a ballerina and a danseur noble)
an exact duplicate	a musical composition for two performers
South American tea-like drink made from leaves of a South American holly called mate	a pair who associate with one another
a person's partner in marriage	two performers or singers who perform together
the partner of an animal (especially a sexual partner)	two items of the same kind
the officer below the master on a commercial ship
informal term for a friend of the same sex
a fellow member of a team
South American holly; leaves used in making a drink like tea
one of a pair

mate (verb)	duet (verb)
place an opponent's king under an attack from which it cannot escape and thus ending the game
engage in sexual intercourse
bring two objects, ideas, or people together