Mammoth Uncensored Word List:
73 words ending with fs, 6 letters long

blaffs bluffs briefs califs chaffs chiefs choofs chuffs cliffs cloffs darafs decafs draffs dwarfs feoffs flaffs fluffs ganefs ganofs gliffs gonefs gonifs gonofs graffs griefs griffs groofs groufs gruffs houffs howffs kalifs kenafs kloofs metifs motifs nyaffs pilafs pluffs pouffs preifs priefs proofs quaffs quiffs quoifs scaffs scarfs scoffs scuffs scurfs serifs sheafs shelfs skelfs skiffs skoffs sluffs snarfs sniffs snuffs sowffs spiffs spoofs staffs stiffs stuffs swarfs swerfs wauffs wharfs whiffs whoofs