coalition vs ally

coalition and ally both are nouns.

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

coalition (noun)	ally (noun)
the union of diverse things into one body or form or group; the growing together of parts	a friendly nation
an organization of people (or countries) involved in a pact or treaty	an associate who provides cooperation or assistance
the state of being combined into one body

coalition (verb)	ally (verb)
	become an ally or associate, as by a treaty or marriage