2 Syllables: SU
bison, brian, brighten, brighton, bryan, bryant, client, diamond, dryden, frighten, giant, guidance, heighten, heinemann, highland, iceland, ion, island, item, ivan, leiden, leyden, licence, license, lichen, lighten, liken, lion, lyman, lyon, pliant, ripen, ryan, science, scion, sidon, silence, silent, simon, simon's, sion, stipend, strident, tighten, titan, trident, triumph, viands, violence, violent, widen, zion
3 Syllables: USU
alignment, alliance, appliance, assignment, asylum, atheism, compliance, compliant, confinement, connivance, contrivance, defiance, defiant, defilement, enlighten, enliven, excitement, hawaiian, horizon, incitement, indictment, orion, refinement, reliance, reliant, subsidence, unlicensed
4 Syllables: UUSU
Found 81 words across 3 groupings. Skipped 38 excess words of a similar stem.