scrubbing brush vs scrubber

scrubbing brush and scrubber both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrubbing brush	Yes	No	No	No
scrubber	Yes	No	No	No

As nouns, scrubbing brush and scrubber are synonyms defined as:

scrubbing brush and scrubber: a brush with short stiff bristles for heavy cleaning

Other synonyms of scrubbing brush include scrub brush.

scrubbing brush (noun)	scrubber (noun)
a brush with short stiff bristles for heavy cleaning	a purifier that removes impurities from a gas
	a brush with short stiff bristles for heavy cleaning
	a worker who uses a scrub brush to clean a surface (usually a floor or deck)