Or search: tense, pinched, stenosed, stenotic, phonetics
2 Syllables: SU
bigot, fitted, frigate, idiot, knitted, liquid, pickets, pitted, thickets, ticket, wicked, wicket
3 Syllables: USU
admitted, convicted, deliberate, depicted, emitted, exhibits, inhibit, insipid, omitted, permitted, predicted, prohibit, restricted, submitted, transmitted
4 Syllables: UUSU
contradicted

Found 28 words across 3 groupings. Skipped 7 excess words of a similar stem.