join vs mate

join and mate both are nouns.

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

As verbs, mate is a hyponym of join; that is, mate is a word with a more specific, narrower meaning than join:

As verbs, mate is a hyponym of join; that is, mate is a word with a more specific, narrower meaning than join:

join (noun)	mate (noun)
a set containing all and only the members of two or more given sets	a chess move constituting an inescapable and indefensible attack on the opponent's king
the shape or manner in which things come together and a connection is made	an exact duplicate
	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

join (verb)	mate (verb)
make contact or come together	place an opponent's king under an attack from which it cannot escape and thus ending the game
cause to become joined or linked	engage in sexual intercourse
become part of; become a member of a group or organization	bring two objects, ideas, or people together
come into the company of
be or become joined or united or linked