ally vs coalition

ally and coalition both are nouns.

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

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

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