Mammoth Uncensored Word List:
46 words ending with fs, 9 letters long

airproofs aperitifs blastoffs bodysurfs breakoffs brushoffs bugproofs bumfluffs calctuffs checkoffs dandriffs dandruffs digestifs disproofs dogproofs dummkopfs dyestuffs footmuffs forehoofs handcuffs kerchiefs knockoffs langlaufs mischiefs moonroofs neckbeefs niffnaffs outbluffs overruffs palstaffs pentroofs riffraffs rotproofs sanserifs shinleafs standoffs subchiefs subdwarfs sunproofs tipstaffs tradeoffs unbeliefs windsurfs woodroofs woodruffs writeoffs