Allies vs coalition

Allies and coalition both are nouns.

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

As nouns, coalition is a hypernym of Allies; that is, coalition is a word with a broader meaning than Allies:

Allies: in World War I the alliance of Great Britain and France and Russia and all the other nations that became allied with them in opposing the Central Powers
coalition: an organization of people (or countries) involved in a pact or treaty

Other hypernyms of Allies include alignment, alinement, alliance.

As nouns, coalition is a hypernym of Allies; that is, coalition is a word with a broader meaning than Allies:

Allies: the alliance of nations that fought the Axis in World War II and which (with subsequent additions) signed the charter of the United Nations in 1945
coalition: an organization of people (or countries) involved in a pact or treaty

Other hypernyms of Allies include alignment, alinement, alliance.

Allies (noun)	coalition (noun)
in World War I the alliance of Great Britain and France and Russia and all the other nations that became allied with them in opposing the Central Powers	the union of diverse things into one body or form or group; the growing together of parts
the alliance of nations that fought the Axis in World War II and which (with subsequent additions) signed the charter of the United Nations in 1945	an organization of people (or countries) involved in a pact or treaty
	the state of being combined into one body