Mammoth Uncensored Word List:
154 words ending with m, 14 letters long

abstractionism allelomorphism andromonoecism anthropophuism antialcoholism anticapitalism antiliberalism antimilitarism antimonarchism antipatriotism antiquarianism antiradicalism apheliotropism apocalypticism associationism bidialectalism bioregionalism breatharianism centenarianism centripetalism cholecystogram chondrocranium chordamesoderm chordomesoderm clavicytherium conservatorium constructivism continentalism counterprogram cruciverbalism cryptorchidism cyanobacterium cyberterrorism dichromaticism disciplinarium disequilibrium dissolutionism echocardiogram ectoparasitism egalitarianism electromyogram encyclopaedism endoparasitism evangelicalism exceptionalism existentialism extensionalism ferrimagnetism ferromagnetism fideicommissum flexitarianism fundamentalism galvanotropism heterochronism heteromorphism heterothallism hobbledehoydom hobbledehoyism holometabolism homochromatism homoeomorphism hypercriticism hypoadrenalism hypochondriasm hypophalangism hypothyroidism incrementalism indifferentism inspirationism intentionalism interactionism intersexualism intuitionalism libertarianism lipogrammatism lymphangiogram matriarchalism megasporangium metachromatism microorchidism millenarianism monochromatism monolingualism multiracialism narcoterrorism necessarianism neocolonialism nephrotomogram nitrobacterium noncognitivism nonequilibrium nonmaterialism nonobjectivism obstructionism operationalism overenthusiasm paleomagnetism parajournalism patriarchalism pentadactylism perfectibilism peripateticism phallocentrism photoperiodism photoradiogram piezomagnetism pococuranteism polychromatism polysynthesism polysynthetism predeterminism prescriptivism probabiliorism progressionism prohibitionism proletarianism pseudoaneurysm pseudomelanism pseudomorphism psilanthropism quattrocentism radiostrontium reactionaryism restitutionism restorationism restrictionism rhapidophyllum rhinosporidium sacramentalism sceuophylacium semiparasitism sensationalism sentimentalism servomechanism spermatogonium stalactitiform substantialism synaposematism telejournalism territorialism tetartohedrism theocentricism theriomorphism thermochromism traditionalism transsexualism transvestitism tripersonalism trituberculism ultramodernism ultramontanism unsectarianism utilitarianism xanthochromism