2 Syllables: SU
beckon, Bedlam, Breton, deaden, Edmond, Edmund, Edwin, Epsom, extant, leaden, Leben, pregnant, reckon, rectum, reddened, requiem, second, section, segment, septum, sexton, spectrum, threaten, veteran, weapon
3 Syllables: SUU
3 Syllables: USU
acceptance, affection, collection, complexion, conception, connection, connexion, convection, correction, deception, defection, deflection, dejection, detection, direction, ejection, election, erection, exception, expectant, inception, infection, inflection, injection, inspection, investment, objection, perception, perfection, projections, protection, reception, reflection, reflexion, rejection, selection, subjection
4 Syllables: UUSU
circumspection, disaffection, imperfection, insurrection, interregnum, intersection, introspection, Mahometan, misconception, preconceptions, predilection, recollection, reelection, resurrection
Found 77 words across 4 groupings. Skipped 40 excess words of a similar stem.