unite vs conjoin

unite and conjoin both are verbs.

Word	Noun	Adjective	Verb	Adverb
unite	No	No	Yes	No
conjoin	No	No	Yes	No

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

unite (verb)	conjoin (verb)
become one	make contact or come together
join or combine	take in marriage; married
act in concert or unite in a common purpose or belief
bring together for a common purpose or action or ideology or in a shared situation
have or possess in combination
be or become joined or united or linked