2 Syllables: SU
billion, bitten, brigands, brigham, brilliance, brilliant, britain, britain's, briton, chicken, children, children's, christened, clearance, dickens, difference, different, distance, distant, dition, driven, ference, fission, flippant, gibbon, given, glistened, hidden, hilton, ibn, ilium, ism, kitchen, kitten, lillian, linen, listen, lytton, million, milton, mission, pigeon, pilgrim, piston, pittance, prism, prison, quicken, rhythm, ribbon, ridden, risen, riven, schism, serum, sicken, silken, simmons, smitten, stiffen, stricken, striven, sylvan, symonds, system, theorem, thicken, titian, tristram, villain, vision, william, wilson, wilson's, wilton, women, women's, written
2 Syllables: US
3 Syllables: SUU
3 Syllables: USU
addition, adherence, adherent, admission, admittance, ambition, appearance, arisen, assistance, assistant, attrition, bouillon, brazilian, castilian, civilian, cognition, coherence, coherent, collision, commission, condition, consistence, consistent, contrition, decision, deficient, deliverance, derision, division, edition, efficient, elysian, emission, envision, excision, existence, existent, forgiven, franciscan, fruition, fulfillment, fulfilment, ignition, imprison, incision, indifference, indifferent, insistence, insistent, logician, macmillan, magician, munitions, musician, nutrition, omission, omniscience, omniscient, parisian, partition, patrician, pavilion, perdition, permission, persistence, persistent, petition, physician, position, precision, proficient, provision, religion, remission, remittance, rendition, resilience, resilient, resistance, resistant, revision, rewritten, sedition, sicilian, submission, subsistence, sufficient, suspicion, technician, tradition, transition, transmission, tuition, unbidden, unwritten, vermilion, volition
4 Syllables: UUSU
abolition, acquisition, admonition, ammunition, apparition, beneficent, circumcision, coalition, coefficient, coexistence, competition, composition, concomitant, definition, demolition, deposition, disappearance, disposition, disquisition, ebullition, electrician, equidistant, erudition, exhibition, expedition, exposition, imposition, incoherence, incoherent, inconsistent, indecision, inefficient, inhibition, inquisition, insufficient, interference, intermission, intermittent, intuition, irreligion, malnutrition, maximilian, nonexistent, opposition, perseverance, politician, precondition, premonition, preposition, prohibition, proposition, reappearance, recognition, reminiscence, reminiscent, repetition, requisition, rhetorician, statistician, superstition, supervision, supposition, transposition
5 Syllables: UUUSU
academicians, decomposition, indisposition, interposition, juxtaposition, mathematician, metaphysician, predisposition, presuppositions, superposition
Found 250 words across 6 groupings. Skipped 102 excess words of a similar stem.