affiliate vs ally

affiliate and ally both are nouns.

Word	Noun	Adjective	Verb	Adverb
affiliate	Yes	No	Yes	No
ally	Yes	No	Yes	No

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

Other hyponyms of affiliate include date, go out, go steady, see, accompany, companion, company, keep company.

affiliate (noun)	ally (noun)
a subsidiary or subordinate organization that is affiliated with another organization	a friendly nation
a subordinate or subsidiary associate; a person who is affiliated with another or with an organization	an associate who provides cooperation or assistance

affiliate (verb)	ally (verb)
join in an affiliation	become an ally or associate, as by a treaty or marriage
keep company with; hang out with