mine vs strip mine

mine and strip mine both are nouns.

Word	Noun	Adjective	Verb	Adverb
mine	Yes	No	Yes	No
strip mine	Yes	No	Yes	No

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

mine: excavation in the earth from which ores and minerals are extracted
strip mine: an open mine (usually for coal) where the seams run close to the surface

As verbs, strip mine is a hyponym of mine; that is, strip mine is a word with a more specific, narrower meaning than mine:

Other hyponyms of mine include surface-mine, surface mine.

mine (noun)	strip mine (noun)
explosive device that explodes on contact; designed to destroy vehicles or ships or to kill or maim personnel	an open mine (usually for coal) where the seams run close to the surface
excavation in the earth from which ores and minerals are extracted

mine (verb)	strip mine (verb)
lay mines	extract (ore) from a strip-mine
get from the earth by excavation