2 Syllables: SU
barest, barracks, breathless, carrots, chestnuts, crevice, deafness, dresses, edges, epochs, ferrous, freshest, freshness, headless, heaviest, heiress, jealous, Lennox, Lenox, lettuce, leverage, menace, merest, merits, message, necklace, parrots, pellets, precious, PREFACE, premised, presses, rarest, reckless, restless, sheriff, sketches, stresses, stretches, tariff, tenets, tennis, terrace, trellis, trespass, Venice, wedges, zealots, zealous
3 Syllables: SUU
3 Syllables: USU
asbestos, demerits, depresses, develops, embarrass, envelops, expresses, impetuous, inherits, Marcellus, possesses, successes, Vincennes
Found 64 words across 3 groupings. Skipped 7 excess words of a similar stem.