2 Syllables: SU
beckon, Bedlam, Breton, deaden, Edmond, Edmund, Edwin, Epsom, extant, leaden, Leben, pregnant, reckon, rectum, reddened, requiem, second, section, segment, septum, sexton, 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, projection, 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 76 words across 4 groupings. Skipped 41 excess words of a similar stem.