aircraft carrier vs warship

aircraft carrier and warship both are nouns.

Word	Noun	Adjective	Verb	Adverb
aircraft carrier	Yes	No	No	No
warship	Yes	No	No	No

As nouns, warship is a hypernym of aircraft carrier; that is, warship is a word with a broader meaning than aircraft carrier:

aircraft carrier: a large warship that carries planes and has a long flat deck for takeoffs and landings
warship: a government ship that is available for waging war

Other hypernyms of aircraft carrier include combat ship, war vessel.

aircraft carrier (noun)	warship (noun)
a large warship that carries planes and has a long flat deck for takeoffs and landings	a government ship that is available for waging war