alliance vs ally

alliance and ally both are nouns.

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

alliance (noun)	ally (noun)
the act of forming an alliance or confederation	a friendly nation
a formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim	an associate who provides cooperation or assistance
an organization of people (or countries) involved in a pact or treaty
a connection based on kinship or marriage or common interest
the state of being allied or confederated

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