Or search: mao, marx, marti, rebel, villa, marat, danton, zapata, guevara, radical, trotsky, girondin, insurgent, girondist, subverter
3 Syllables: SUU
crucifix, humanist, humorist, lunatic, nuisances, unionists
5 Syllables: UUUSU
individualist

Found 7 words across 2 groupings. Skipped 2 excess words of a similar stem.