countermine vs mine

countermine and mine both are nouns.

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

As verbs, mine is a hypernym of countermine; that is, mine is a word with a broader meaning than countermine:

countermine (noun)	mine (noun)
(military) a tunnel dug to defeat similar activities by the enemy	explosive device that explodes on contact; designed to destroy vehicles or ships or to kill or maim personnel
	excavation in the earth from which ores and minerals are extracted

countermine (verb)	mine (verb)
destroy enemy mines with one's own mines	lay mines
destroy property or hinder normal operations	get from the earth by excavation