magnetic mine vs marine mine

magnetic mine and marine mine both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnetic mine	Yes	No	No	No
marine mine	Yes	No	No	No

As nouns, marine mine is a hypernym of magnetic mine; that is, marine mine is a word with a broader meaning than magnetic mine:

magnetic mine: (nautical) a marine mine that is detonated by a mechanism that responds to magnetic material (as the steel hull of a ship)
marine mine: an explosive mine designed to destroy ships that bump into it

Other hypernyms of magnetic mine include floating mine.

magnetic mine (noun)	marine mine (noun)
(nautical) a marine mine that is detonated by a mechanism that responds to magnetic material (as the steel hull of a ship)	an explosive mine designed to destroy ships that bump into it