2 Syllables: SU
bias, brightest, climates, crisis, cypress, cyrus, direst, driest, dryness, fibrous, finest, highest, highness, ibis, iris, isis, lias, lifeless, lightest, minus, pilots, pious, pirates, pius, priceless, primus, prius, privates, righteous, riots, shyness, silas, sinus, slightest, tigris, tireless, titus, typhus, violets, virus, widest, wisest
2 Syllables: US
3 Syllables: USU
aquinas, arthritis, bronchitis, darius, desirous, elias, impious, matthias, papyrus, tobias, unbiased, unbiassed, unrighteous
4 Syllables: UUSU
Found 59 words across 4 groupings. Skipped 1 excess word of a similar stem.