scrubber vs scrubbing brush

scrubber and scrubbing brush both are nouns.

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

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

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

Other synonyms of scrubber include scrub brush.

scrubber (noun)	scrubbing brush (noun)
a purifier that removes impurities from a gas	a brush with short stiff bristles for heavy cleaning
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)