2558 words end in “M”
3 letters
4 letters
atombeamboomcalmdoomdrumexamfarmfilmfirmfoamformfromharmitemnormpalmpoemroomseemslimstemswimteamtermthemtrimwarmwhomwormzoomahemalumarumbalmbarmbermblambrimchamchumclamcormcramculmdeemdermdormdoumdramflamgaumgermgeumglimglomglumgramgrimgrumhaemhalmhelmhermholmidemimamjismloamloommaimmalmmummneemneumogamovumoximpermplumpramprimpromreamroamscamscumseamshamshimskimslamslumstumswamswumteemtoomtramwhamwhimylem
5 letters
alarmalbumbloomcharmclaimcreamdreamforummodemrealmserumspermsteamstormabeamabohmabysmadeemagismalgumaurumaxiombedimbegumbesombosombreambroombuxomcaromcecumcelomchasmchirmdatumdegumdeismdenimdunamdurumenormenzymfanumfilumfleamforamgenomgleamgloamgloomgolemgoyimgroomhakimharemhaulmhilumhokumidiomihramileumiliumimauminarmjoramjorumjugumkalamkelimkhoumkilimlarumlinumlocummadammaximmiasmminimnizamnotumoakumodeumodiumoghamoleumoniumopiumplasmpraamprismproempsalmqualmrearmrehemretemrheumsagumsatemscramscrimscrumsebumsedumseismshawmskelmsmarmsodomsolumspasmstrumswarmtharmthermthrumtotemunarmvelumvenomvroomwhelmxylemyomimziram
6 letters
asylumbottomcustomgrahaminformmediummuseumrandomredeemreformrhythmsodiumstreamsystemvacuumvictimwisdomabloomacetumadytumaeciumaffirmageismagleamalarumalliumamylumanademanonymanthemantrumasarumashramaswarmatriumautismbaalimbalsambantambariumbecalmbedlambegrimbeldambeseembewormbiformbunkumcaecumcarromcentumceriumcesiumchiasmchrismciliumcivismcoelomcondomconiumcopalmcoriumcrinumcubismcundumcuprumcuriumdefoamdeformdegermdepermdewormdiademdiatomdictumdinkumdirdumdirhamdisarmdodgemdogdomdorsumdrachmdumdumegoismembalmemblemengrameonismeponymerbiumesteemestrumfandomfantomfathomfavismferbamferrumfoliumfrenumfulhamfullamgoddamgoniumgranumgypsumhakeemhansomhareemheliumholismibidemimbalmindiuminfirminseamiodismioniumiterumjetsamjetsomkaliumlabiumlabrumlactamlingamlissomlogjamluteumlyceumlyrismmagnummaihemmarrammayhemmegohmmegrimmentummiliumminiummisaimmomismmonismmutismnanismnapalmnomismnoncomnudismobiismogrismoidiumomasumorgasmosmiumostiumpablumpassimpaynimpeplumphenomphlegmphloemphylumpileumplenumpodiumpogrompompomporismpossumprearmprelimpurismquorumracismradiumransomrectumrefilmregnumreteamretrimrewarmsachemsacrumsadismsalaamschismscreamscutumseldomsensumseptumsexismshalomsholomsimoomsitcomslalomspiremsputumsquirmsubgumsyncomtalcumtandemtectumtediumteliumtergumthairmtheismthiramtruismunhelmunseam