scrubbing brush vs scrub brush

scrubbing brush and scrub brush both are nouns.

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

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

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

Other synonyms of scrubbing brush include scrubber.

scrubbing brush (noun)	scrub brush (noun)
a brush with short stiff bristles for heavy cleaning	a brush with short stiff bristles for heavy cleaning