Mammoth Uncensored Word List:
45 words ending with ss, 6 letters long

abbess access across admass assess awless badass bagass bekiss betoss bypass camass caress cavass citess deboss demiss duress egress emboss endoss excess gneiss harass imboss kaross kavass kumiss megass morass obsess ogress potass recess remiss repass schuss speiss strass stress unkiss unless uptoss vakass vowess