Feudalism rhymes with:
bilingualism, cannibalism, capitalism, centralism, colonialism, commercialism, dualism, emotionalism, entrepreneurialism, environmentalism, evangelism, factionalism, fatalism, federalism, formalism, fundamentalism, gradualism, imperialism, individualism, intellectualism, internationalism, journalism, legalism, liberalism, materialism, mercantilism, metabolism, minimalism, moralism, mutualism, nationalism, naturalism, neutralism, nihilism, parochialism, pastoralism, paternalism, pluralism, populism, professionalism, provincialism, racialism, radicalism, sensationalism, socialism, supernaturalism, symbolism, territorialism, unilateralism