2 Syllables: SU
benches, blemish, chemist, deathless, Denis, Dennis, dentist, ethnic, exit, fences, Flemish, friendship, Greenwich, headship, Kenneth, Kentish, lenses, Memphis, menace, pensive, premise, Prentice, Sedgwick, senses, tennis, tenses, trenches, Venice
3 Syllables: USU
appendage, Appendix, apprentice, assemblage, attentive, authentic, concentric, condenses, defenses, defensive, dispenses, eccentric, expenses, expensive, extensive, forensic, incentive, intensive, inventive, offenses, offensive, percentage, preventive, relentless, replenish, retentive, unblemished
4 Syllables: UUSU
Found 60 words across 3 groupings. Skipped 7 excess words of a similar stem.