2 Syllables: SU
3 Syllables: SUU
admirable, affable, animal, arable, cannibal, capital, Capitol, casual, classical, comparable, fallible, graphical, Hannibal, lateral, laughable, mackerel, magical, marital, Nationale, passable, pastoral, practical, radical, tactical, taxable, tractable, tragical
4 Syllables: USUU
adaptable, bilateral, botanical, collateral, compatible, diagonal, dynamical, fanatical, fantastical, hexagonal, impassable, implacable, impractical, infallible, inflammable, intractable, irascible, irrational, mechanical, octagonal, pyramidal, theatrical, tyrannical, unnatural
5 Syllables: UUSUU
biographical, enigmatical, geographical, incompatible, mathematical, multinational, piratical, preternatural, problematical, puritanical, supernatural, topographical, typographical, unilateral
6 Syllables: UUUSUU
7 Syllables: UUUUSUU
Found 70 words across 6 groupings. Skipped 7 excess words of a similar stem.