scouring vs scrubbing

scouring and scrubbing both are nouns.

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

As nouns, scouring and scrubbing are synonyms defined as:

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

Other synonyms of scouring include scrub.

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