Or search: caution, prudence, wariness, sagacity, judgement, chariness, discretion, precaution, discernment, sagaciousness, confidentiality
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, 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
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.