2 Syllables: SU
beckon, Bedlam, Breton, deaden, Edmond, Edmund, Edwin, Epsom, extant, freshman, leaden, Leben, pregnant, question, reckon, rectum, reddened, requiem, second, section, segment, septum, sexton, spectrum, threaten, veteran, weapon
3 Syllables: SUU
3 Syllables: USU
acceptance, affection, collection, complexion, conception, congestion, connection, connexion, convection, correction, deception, defection, deflection, dejection, detection, digestion, direction, ejection, election, erection, exception, expectant, inception, infection, inflection, ingestion, injection, inspection, investment, objection, perception, perfection, projection, protection, reception, reflection, reflexion, refreshment, rejection, selection, subjection, suggestion, unquestioned
4 Syllables: UUSU
circumspection, disaffection, imperfection, indigestion, insurrection, interregnum, intersection, introspection, Mahometan, misconception, preconceptions, predilection, recollection, reelection, resurrection
Found 86 words across 4 groupings. Skipped 45 excess words of a similar stem.