2 Syllables: SU
bias, blindness, brightens, brightest, brightness, byron's, childish, childless, china's, crisis, diamonds, driest, dryness, eyelids, fineness, finest, frightens, guileless, guises, heightens, highest, highlands, highness, hybrids, ibis, ices, isis, islands, items, kindest, kindness, lias, lichens, lifeless, lightest, lightness, likeness, linings, lions, liveliest, lyons, mightiest, mildest, mildness, mileage, minus, nicest, pious, pius, priceless, prices, primus, prius, prizes, righteous, ripeness, ripens, risings, scientists, shyness, silas, simon's, sinus, sirens, sizes, slices, slightest, spices, strivings, stylish, tidings, tightness, timeless, tiniest, titans, titus, typhus, viands, vices, whiteness, whitish, widens, widest, wildest, wildness, wisest, writings
2 Syllables: US
3 Syllables: USU
advices, advises, aquinas, arises, arthritis, assizes, asylums, bronchitis, comprises, conciseness, darius, decisive, derisive, despises, devices, disguises, divisive, elias, environs, goliath, horizons, impious, incisive, matthias, obliges, politeness, suffices, surmises, surprises, tobias, unbiased, unbiassed, unkindness, unrighteous, uprightness
4 Syllables: UUSU
Found 129 words across 4 groupings. Skipped 2 excess words of a similar stem.