2 Syllables: SU
acids, adage, Adams, Allen's, Arabs, ashes, asses, Athens, atoms, average, badges, baggage, ballads, barons, batches, cabbage, cabins, cannons, canons, carriage, Cassius, castings, catches, challenge, chaplains, chasms, clashes, classes, crashes, damage, dashes, dragons, famines, Fascist, fashions, fastenings, fastens, fastest, fathoms, flashes, gallons, gaseous, gases, glasses, grasses, gravest, happens, hatches, lashes, Latins, lavish, mammoth, manage, massive, matches, matchless, package, passage, passes, passeth, passions, passive, patches, pathless, phantoms, rapids, rashness, rations, ravage, ravished, Sabbath, saplings, sashes, savage, scratches, snatches, spasms, splashes, talons, trappings, vastness, waggons, wagons
3 Syllables: USU
Agassiz, assassins, attaches, bananas, combative, Damascus, despatches, disastrous, dispatches, Erasmus, examines, imagines, impassive, molasses, Parnassus, pianos, pugnacious, rapacious, surpasses, unchallenged
4 Syllables: UUSU
Found 104 words across 3 groupings. Skipped 12 excess words of a similar stem.