warfare vs drug war

warfare and drug war both are nouns.

Word	Noun	Adjective	Verb	Adverb
warfare	Yes	No	No	No
drug war	Yes	No	No	No

As nouns, drug war is a hyponym of warfare; that is, drug war is a word with a more specific, narrower meaning than warfare:

warfare: an active struggle between competing entities
drug war: conflict between law enforcement and those who deal in illegal drugs

Other hyponyms of warfare include trench warfare.

warfare (noun)	drug war (noun)
the waging of armed conflict against an enemy	conflict between law enforcement and those who deal in illegal drugs
an active struggle between competing entities