1 Syllable: S
Deus
2 Syllables: SU
aegis, biggest, bigot, billet, biscuit, Bishop, Bridget, briefest, cheapest, chiefest, Christmas, citrus, clearness, dearest, deepest, digit, Egypt, Enoch, epoch, eras, fearless, fetus, fiercest, fittest, foetus, frigate, genus, grievous, grimace, hillock, isthmus, Jesus, keenest, leafless, leaflet, limit, listless, meanest, millet, minute, minutest, mistress, nearest, nearness, needless, Nicholas, nitrous, peanut, peerage, Philip, pickets, pivot, priestess, quibus, rebus, reflux, richest, rivet, secret, serious, sleepless, specious, speechless, spinach, spirit, sweetest, syrup, thickets, ticket, treatise, treeless, venous, Venus, vicious, viscous, weakest, wicket, zealots
2 Syllables: US
3 Syllables: USU
ambitious, Archbishop, assiduous, auspicious, bacillus, capricious, deliberate, delicious, delirious, Demetrius, Dominus, egregious, elicits, exhibits, explicit, extremest, extremists, facetious, factitious, fictitious, illicit, imperious, implicit, inhibit, Josephus, judicious, Lucretius, machinist, malicious, mysterious, Narcissus, nutritious, officious, pernicious, prestigious, prodigious, prohibit, propitious, religious, seditious, Severus, sincerest, suspicious, Tiberius, utilise
4 Syllables: UUSU
adventitious, avaricious, deleterious, expeditious, injudicious, intravenous, irreligious, superstitious, surreptitious, unpropitious, unsuspicious
Found 136 words across 5 groupings. Skipped 21 excess words of a similar stem.