Mammoth Uncensored Word List:
23 words ending with ws, 11 letters long

bonemarrows contraflows flightcrews foreshadows goodfellows groundcrews handbarrows hurlbarrows middlebrows overborrows overshadows playfellows quartersaws restharrows shopwindows stereoviews thumbscrews wapenschaws wapinschaws wappenshaws whillywhaws workfellows yokefellows