mining vs minelaying

mining and minelaying both are nouns.

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

As nouns, mining and minelaying are synonyms defined as:

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

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