country vs ally

country and ally both are nouns.

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

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

country (noun)	ally (noun)
a politically organized body of people under a single government	a friendly nation
the people who live in a nation or country	an associate who provides cooperation or assistance
the territory occupied by a nation
an area outside of cities and towns
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)

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