2 Syllables: SU
bias, brightest, climates, crisis, cypress, cyprus, cyrus, diets, direst, driest, dryness, fibrous, finest, highest, highness, ibis, irish, isis, islets, lias, lifeless, lightest, minus, nicest, pilots, pious, pirates, pius, priceless, primus, prius, privates, righteous, riots, shyness, silas, sinus, slightest, stylish, tigris, tireless, titus, typhus, violets, virus, whitish, widest, wireless, wisest
2 Syllables: US
3 Syllables: SUU
3 Syllables: USU
aquinas, arthritis, bronchitis, conciseness, darius, desirous, elias, impious, matthias, osiris, papyrus, tobias, unbiased, unbiassed, unrighteous
4 Syllables: USUU
4 Syllables: UUSU
Found 73 words across 6 groupings. Skipped 2 excess words of a similar stem.