mopping vs scouring

mopping and scouring both are nouns.

Word	Noun	Adjective	Verb	Adverb
mopping	Yes	No	No	No
scouring	Yes	No	No	No

As nouns, scouring is a hypernym of mopping; that is, scouring is a word with a broader meaning than mopping:

mopping: cleaning with a mop
scouring: the act of cleaning a surface by rubbing it with a brush and soap and water

Other hypernyms of mopping include scrub, scrubbing.

mopping (noun)	scouring (noun)
cleaning with a mop	the act of cleaning a surface by rubbing it with a brush and soap and water
	moving over territory to search for something