mate vs couplet

mate and couplet both are nouns.

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

mate (noun)	couplet (noun)
a chess move constituting an inescapable and indefensible attack on the opponent's king	a stanza consisting of two successive lines of verse; usually rhymed
an exact duplicate	two items of the same kind
South American tea-like drink made from leaves of a South American holly called mate
a person's partner in marriage
the partner of an animal (especially a sexual partner)
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)	couplet (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