Or search: crib, pony, spin, caption, coating, version, defrayal, rendition, defrayment, supertitle, retroversion, mistranslation, reinterpretation
2 Syllables: SU
trembling
3 Syllables: SUU
centering, entering, gentlemen, lengthening, mentioning, rendering, sensitive, sentences, strengthening, tempering, tendering, tentative, venturing
3 Syllables: USU
assembling, remembering, resembling
4 Syllables: USUU
apprentices, commemorative, contemplative, insensitive, remembrances, surrendering
5 Syllables: UUSUU
argumentative, representative

Found 25 words across 5 groupings. Skipped 1 excess word of a similar stem.