fall in vs unify

fall in and unify both are verbs.

Word	Noun	Adjective	Verb	Adverb
fall in	No	No	Yes	No
unify	No	No	Yes	No

As verbs, unify is a hyponym of fall in; that is, unify is a word with a more specific, narrower meaning than fall in:

fall in (verb)	unify (verb)
break down, literally or metaphorically	become one
become part of; become a member of a group or organization	join or combine
to take one's place in a military formation or line	to bring or combine together or with something else
	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