2 Syllables: SU
3 Syllables: SUU
bitterest, businesses, frivolous, limitless, mischievous, mistresses, rigorous, Spiritus, syllabus, timorous, vigorous, villainous
4 Syllables: USUU
5 Syllables: UUSUU
Found 19 words across 4 groupings. Skipped 1 excess word of a similar stem.