Mammoth Uncensored Word List:
23 words ending with w, 10 letters long

bonemarrow contraflow flightcrew foreshadow goodfellow groundcrew handbarrow hurlbarrow middlebrow overborrow overshadow playfellow quartersaw restharrow shopwindow stereoview thumbscrew wapenschaw wapinschaw wappenshaw whillywhaw workfellow yokefellow