3 Syllables: SUU
Boniface, Caucasus, commonest, cooperate, doctorate, dominate, lawlessness, moderate, nominate, novelist, obdurate, oftenest, ominous, operate, oscillate, profitless, propagate, prophetess, proselytes, prosperous, sonorous, thoughtlessness, tolerate, waterway
3 Syllables: USU
4 Syllables: USUU
accommodate, Acropolis, anomalous, anonymous, autonomous, conglomerate, corroborate, denominate, exonerate, geologist, Herodotus, homologous, hypothesis, idolatrous, inaugurate, metropolis, monotonous, nitrogenous, predominate, psychologist, rhinoceros, sarcophagus, synonymous, Theophilus
5 Syllables: UUSUU
Found 50 words across 4 groupings. Skipped 9 excess words of a similar stem.