Or search: bend, warp, bending, windage, deviance, deviation, diversion, deflexion, aberrance, aberrancy, aberration, digression, refraction, divagation, refractivity
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
dissection
3 Syllables: USU
acceptance, affection, collection, complexion, conception, connection, connexion, convection, correction, deception, defection, 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.