2 Syllables: SU
Aldrich, bosses, Brahmins, callings, causes, clauses, clotted, coffins, College, Collins, cottage, crosses, crossings, dotted, drawbridge, drawings, droppings, faultless, frosted, glosses, Hawkins, Hodges, Hollis, hostage, jotted, knotted, knowledge, lauded, lodges, lodgings, losses, mosses, nodded, notches, offerings, olive, Ovid, pauses, plotted, polish, potted, prodded, Robbins, rotted, sauces, sausage, solstice, spotted, squatted, stockings, stoppage, tallest, tosses, trotted, vases, Wallace, Wallis, washes, washings, watches
3 Syllables: USU
abolish, acknowledge, allotted, applauded, defrauded, demolish, exhausted, exhaustive, unpolished, unspotted
4 Syllables: UUSU
superadded, unacknowledged
Found 72 words across 3 groupings. Skipped 4 excess words of a similar stem.