unify vs league

unify is not a noun while league is a noun.

Word	Noun	Adjective	Verb	Adverb
unify	No	No	Yes	No
league	Yes	No	Yes	No

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

unify (noun)	league (noun)
	an association of states or organizations or individuals for common action
	an association of sports teams that organizes matches for its members
	an obsolete unit of distance of variable length (usually 3 miles)

unify (verb)	league (verb)
become one	unite to form a league
join or combine
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