2 Syllables: SU
absence, absent, action, Acton, Adam, Adrian, alien, apron, Arian, atom, axiom, baton, blacken, bracken, cabin, cadmium, Captain, caption, Caspian, chaplain, Chapman, Chatham, cranium, datum, dragon, Fabian, faction, fatten, flagrant, flatten, flaxen, fraction, fragment, fragrance, fragrant, gladden, gradient, happen, Hatton, Jackson, Jackson's, Kaplan, Latin, Madam, Madame, Madden, madmen, magnum, matin, mation, matron, maxim, patent, patron, Patton, platinum, radiance, radiant, radium, saddened, salient, satin, Saxon, slacken, stadium, stagnant, Staten, Stratton, stratum, traction, vagrant, waggon, wagon, waxen
3 Syllables: USU
abstraction, Arabian, Arcadian, attraction, Canadian, combatant, contraction, detraction, diffraction, distraction, enactment, exaction, extraction, geranium, gymnasium, inaction, infraction, mammalian, Manhattan, misshapen, Moravian, palladium, potassium, reaction, refraction, retraction, subtraction, titanium, transaction, uranium, Vespasian
4 Syllables: UUSU
Alexandrian, AngloSaxon, benefactions, interaction, putrefaction, satisfaction, Scandinavian, subterranean
5 Syllables: UUUSU
Found 115 words across 4 groupings. Skipped 49 excess words of a similar stem.