2 Syllables: SU
ambient, ammon, annum, anson, anthem, bantam, brandon, cadmium, camden, cannon, canon, canton, canyon, champion, dampened, famine, franklin's, ganglion, grandson, hammond, hampden, hampton, handsome, hangman, hansen, hanson, langdon, mammon, mansion, phantom, plantain, rampant, random, ransom, salmon, sampson, samson, sanction, sanctum, shannon, stanton, tandem, tangent, transient
3 Syllables: USU
abandon, advancement, buchanan, byzantium, commandment, companion, embankment, enchantment, enhancement, examined, examines, expansion, northampton, southampton
4 Syllables: UUSU
Found 61 words across 3 groupings. Skipped 20 excess words of a similar stem.