Mammoth Uncensored Word List:
44 words ending with sm, 6 letters long

ageism autism bonism chiasm chrism civism cubism dudism egoism eonism favism holism hylism iodism laxism lyrism magism malism merism momism monism mutism nanism nazism nomism nudism obeism obiism ogrism orgasm papism porism purism racism sadism schism sexism sizism taoism telesm theism truism verism yogism