minelaying vs mining

minelaying and mining both are nouns.

Word	Noun	Adjective	Verb	Adverb
minelaying	Yes	No	No	No
mining	Yes	No	No	No

As nouns, minelaying and mining are synonyms defined as:

minelaying and mining: laying explosive mines in concealed places to destroy enemy personnel and equipment

minelaying (noun)	mining (noun)
laying explosive mines in concealed places to destroy enemy personnel and equipment	the act of extracting ores or coal etc from the earth
	laying explosive mines in concealed places to destroy enemy personnel and equipment