1 Syllable: S
Deus
2 Syllables: SU
aegis, beaches, beacons, briefest, cheapest, cheapness, chiefest, cleavage, deacons, deepens, deepest, demons, devious, easiest, eras, fetus, foetus, freedoms, Freeman's, genius, genus, grievous, heathens, Jesus, keenest, keenness, leafless, leakage, legions, lesions, meanest, meanness, museums, neatness, needless, peaches, peerage, pieces, previous, priestess, reaches, reasons, rebus, regions, seamless, seasons, sleepless, speaketh, specious, speeches, speechless, steepness, Stephens, Stevens, sweetest, sweetness, teaches, tedious, theorems, Theseus, treatise, treeless, venous, Venus, weakens, weakest, weakness
2 Syllables: US
3 Syllables: SUU
3 Syllables: USU
abstemious, accretions, arenas, Aurelius, caprices, completeness, Cornelius, diseases, Dominus, egregious, Ephesians, Eusebius, extremest, extremists, facetious, ingenious, Josephus, Lucretius, machinist, Norwegians, obsequious, Phoenicians, prestigious, Prometheus, secretions, uniqueness, Venetians
3 Syllables: UUS
4 Syllables: UUSU
5 Syllables: UUUSU
Found 104 words across 8 groupings. Skipped 3 excess words of a similar stem.