2 Syllables: SU
bitten, brigands, Brigham, Britain, Britain's, Briton, chicken, Christian, Clifton, Cyprian, Dickens, Dickson, diction, dictum, Dixon, fiction, flippant, friction, Gibbon, Gibson, Gideon, gypsum, hidden, Ibn, idiom, kitten, Lytton, Nixon, Pitman, pittance, quicken, ribbon, Richmond, ridden, shipment, sicken, Sigmund, sixpence, smitten, stricken, thicken, Whitman, written
3 Syllables: SUU
3 Syllables: USU
addiction, admittance, affliction, ascription, benignant, commitment, conscription, constriction, conviction, depiction, description, Egyptian, enlistment, enrichment, equipment, incipient, indignant, infliction, inscription, malignant, meridian, midshipman, Parisians, prediction, prescription, proscription, recipient, remittance, restriction, rewritten, subscription, transcription, unbidden, unchristian, unwritten
3 Syllables: UUS
4 Syllables: UUSU
benediction, concomitant, contradiction, crucifixion, dereliction, equilibrium, intermittent, jurisdiction, superscription
Found 89 words across 5 groupings. Skipped 28 excess words of a similar stem.