3 Syllables: SUU
dualism, nihilism
4 Syllables: SUUU
fatalism, federalism, feudalism, formalism, journalism, naturalism, pluralism, socialism, symbolism, vandalism
5 Syllables: USUUU
colonialism, imperialism, industrialism, materialism, metabolism, paternalism, provincialism, sectarianism
6 Syllables: UUSUUU
sentimentalism
6 Syllables: UUUSUU
individualism
7 Syllables: UUUSUUU
utilitarianism

Found 23 words across 6 groupings.