couple vs join

couple and join both are nouns.

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

As verbs, join is a hypernym of couple; that is, join is a word with a broader meaning than couple:

Other hypernyms of couple include conjoin.

As verbs, join is a hypernym of couple; that is, join is a word with a broader meaning than couple:

couple (noun)	join (noun)
a pair who associate with one another	a set containing all and only the members of two or more given sets
a pair of people who live together	the shape or manner in which things come together and a connection is made
(physics) something joined by two equal and opposite forces that act along parallel lines
two items of the same kind
a small indefinite number

couple (verb)	join (verb)
engage in sexual intercourse	make contact or come together
link together	cause to become joined or linked
bring two objects, ideas, or people together	become part of; become a member of a group or organization
form a pair or pairs	come into the company of
	be or become joined or united or linked