2 Syllables: SU
clearness, dearest, devious, easiest, eras, fearless, fiercest, nearest, nearness, peerage, previous, serious, tedious, Theseus
3 Syllables: SUU
greediness, weariness
3 Syllables: USU
abstemious, Aurelius, delirious, Demetrius, Eusebius, imperious, mysterious, obsequious, Prometheus, severest, Severus, sincerest
4 Syllables: USUU
uneasiness
4 Syllables: UUSU
deleterious, homogeneous

Found 31 words across 5 groupings.