2 Syllables: SU
90, bison, blindly, blithely, Brian, brighten, brightly, Brighton, Bryan, Bryant, Byron, Byron's, client, crises, diamond, Dryden, dryly, finely, Friday, frighten, giant, grimy, guidance, heighten, Heinemann, Highland, highly, Hiram, hygiene, Iceland, icy, idly, ion, island, item, Ivan, ivy, kindly, knightly, Leiden, Leyden, licence, license, lichen, lighten, lightly, likely, liken, lion, lively, Lyman, Lyon, mighty, migrant, mildly, nicely, nightly, nineties, ninety, pliant, psyche, Reilly, rightly, Riley, ripen, Ryan, science, scion, shiny, shyly, Sidon, silence, silent, Simon, Simon's, sion, siren, slightly, slimy, slyly, spicy, sprightly, stipend, strident, tidy, tighten, tightly, timely, tiny, Titan, trident, triumph, tyrant, viands, vibrant, violence, violent, widely, widen, wildly, Wiley, wily, windy, wisely, Zion
3 Syllables: SUU
3 Syllables: USU
alignment, alliance, Almighty, appliance, assignment, asylum, atheism, compliance, compliant, concisely, confinement, connivance, consignment, contrivance, defiance, defiant, defilement, designedly, divinely, enlighten, enliven, environ, excitement, Hawaii, Hawaiian, horizon, incitement, indictment, Orion, politely, precisely, refinement, reliance, reliant, subsidence, unkindly, unlicensed, unlikely, unsightly, untidy, untimely, untiring, unwisely
4 Syllables: UUSU
Found 152 words across 4 groupings. Skipped 45 excess words of a similar stem.