abolitionism, absenteeism, activism, aestheticism, agrarianism, alcoholism, alpinism, altruism, anarchism, aneurism, antiquarianism, astigmatism, atheism, athleticism, authoritarianism, autism
baptism, bolshevism, botulism
cannibalism, capitalism, catechism, centralism, classicism, clericalism, collectivism, commercialism, communism, conformism, counter-terrorism, creationism, criticism, cronyism
dogmatism, dwarfism
elitism, embolism, euphemism, evangelism, exhibitionism, exorcism, expansionism, expressionism, extremism
fanaticism, fatalism, fauvism, favoritism, federalism, feminism, feudalism, fundamentalism, futurism
gallicism
hooliganism, humanism, hyperthyroidism, hypnotism
idealism, imperialism, impressionism
legalism, liberalism, lyricism
magnetism, malapropism, materialism, mercantilism, metabolism, metamorphism, microorganism, militarism, modernism, monotheism, multiculturalism, multilingualism, multiracial, mutualism
nationalism, neoclassicism, neologism, nepotism, nonconformism
occultism
pacifism, parochialism, paternalism, patriotism, perfectionism, pessimism, photojournalism, plagiarism, pluralism, pointillism, pragmatism, prism, provincialism, pugilism
racism, realism, regionalism, relativism, revisionism, rheumatism, ritualism
sadism, secularism, separatism, sexism, skepticism, sophism, surrealism
terrorism, theism, totalitarianism, truism
unionism, unitarianism, utilitarianism
vandalism, vegetarianism, volunteerism
The Greek suffix ism has several meanings such as act, practice, process and theory
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