2 Syllables: SU
bias, blindness, brightest, brightness, childless, china's, climates, crisis, cypress, cyprus, cyrus, direst, driest, dryness, fibrous, finest, guileless, guises, highest, highness, ibis, ices, iris, isis, kindest, kindness, lias, lifeless, lightest, lightness, likeness, liveliest, mightiest, mildest, mildness, mileage, minus, pilots, pious, pirates, priceless, prices, primus, prius, privates, prizes, righteous, riots, ripeness, rises, shyness, silas, sinus, sizes, slices, slightest, spices, tightness, tigris, timeless, tiniest, titus, typhus, vices, violets, virus, whiteness, widest, wildness, wisest
2 Syllables: US
3 Syllables: USU
advices, aquinas, arthritis, bronchitis, comprises, darius, desirous, devices, elias, goliath, impious, matthias, papyrus, politeness, tobias, unbiased, unbiassed, unkindness, unrighteous, uprightness
4 Syllables: UUSU
Found 95 words across 4 groupings. Skipped 1 excess word of a similar stem.