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30 words ending with m, 16 letters long

anthropocentrism anthropomorphism antievolutionism antireductionism authoritarianism collaborationism communitarianism controversialism countercriticism counterterrorism electromagnetism electrooculogram electropherogram environmentalism epiphenomenalism gynandromorphism hyperpituitarism institutionalism internationalism introspectionism mesembryanthemum multiculturalism necessitarianism premillennialism pseudoclassicism spectroheliogram superromanticism supranationalism transnationalism ultranationalism