1 Syllable: S
Deus
2 Syllables: SU
aegis, biggest, bigots, billets, biscuits, bishops, briefest, cheapest, chiefest, Christmas, citrus, clearness, dearest, deepest, digits, epochs, eras, fearless, fetus, fiercest, fittest, foetus, frigates, genus, grievous, grimace, hillocks, isthmus, Jesus, keenest, leafless, leaflets, limits, listless, meanest, minutes, minutest, mistress, nearest, nearness, needless, Nicholas, nitrous, peanuts, peerage, Philips, pickets, priestess, quibus, rebus, reflux, richest, rivets, serious, sleepless, specious, speechless, spinach, sweetest, thickets, tickets, treatise, treeless, venous, Venus, vicious, viscous, weakest, zealots
2 Syllables: US
3 Syllables: USU
ambitious, archbishops, assiduous, auspicious, bacillus, capricious, delicious, delirious, Demetrius, Dominus, egregious, elicits, exhibits, extremest, extremists, facetious, factitious, fictitious, imperious, inhibits, Josephus, judicious, Lucretius, machinist, malicious, mysterious, Narcissus, nutritious, officious, pernicious, prestigious, prodigious, prohibits, propitious, religious, seditious, severest, Severus, sincerest, suspicious, Tiberius, utilise
4 Syllables: UUSU
adventitious, avaricious, deleterious, expeditious, injudicious, intravenous, irreligious, superstitious, surreptitious, unpropitious, unsuspicious
Found 124 words across 5 groupings. Skipped 3 excess words of a similar stem.