combine vs unify

combine is a noun but unify is not a noun.

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

As verbs, unify is a hypernym of combine; that is, unify is a word with a broader meaning than combine:

Other hypernyms of combine include amalgamate, commix, mingle, mix.

As verbs, unify is a hypernym of combine; that is, unify is a word with a broader meaning than combine:

Other hypernyms of combine include amalgamate, commix, mingle, mix.

combine (noun)	unify (noun)
harvester that heads and threshes and cleans grain while moving across the field
an occurrence that results in things being united
a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service

combine (verb)	unify (verb)
mix together different elements	become one
put or add together	join or combine
combine so as to form a whole; mix	to bring or combine together or with something else
gather in a mass, sum, or whole	act in concert or unite in a common purpose or belief
add together from different sources	bring together for a common purpose or action or ideology or in a shared situation
join for a common purpose or in a common action
have or possess in combination