8 letters · 14 points in Scrabble
noun a worker who uses a scrub brush to clean a surface (usually a floor or deck)
noun a brush with short stiff bristles for heavy cleaning
noun a purifier that removes impurities from a gas
originEtymology tree English scrub English -er English scrubber From scrub + -er.
Etymology from Wiktionary, CC BY-SA 3.0