2 Syllables: SU
billet, Bridget, British, ceaseless, civic, clearest, clinic, cricket, critic, cynic, digit, district, edict, Egypt, Felix, finis, finish, Finnish, freest, Friedrich, gibbet, greenish, heedless, helix, limits, lyric, mimic, mystic, mythic, peevish, penis, Philip, Phillip, Phoenix, Phyllis, physic, picket, prefix, quickest, realist, Regis, Rhenish, rickets, scenic, secret, spirit, Swedish, thesis, thickest, thicket, thinness, thinnest, ticket, visit, Willis
3 Syllables: USU
acetic, albeit, artistic, collegiate, diminish, elicit, exhibit, extremist, idealist, idyllic, linguistic, Pacific, prolific, realistic, resistless, revisit, satiric, Semitic, simplistic, solicit, specific, statistic, strategic, stylistic, terrific, uncleanness, unfinished
3 Syllables: UUS
4 Syllables: UUSU
altruistic, analytic, atheistic, Calvinistic, catalytic, communistic, exegesis, fatalistic, hieroglyphic, humanistic, idealistic, impolitic, inauspicious, journalistic, mechanistic, metaphysics, monolithic, nationalistic, naturalistic, optimistic, panegyric, paralytic, parasitic, pessimistic, rationalistic, scientific, socialistic, undiminished, unrealistic
5 Syllables: UUUSU
antagonistic, capitalistic, characteristic, electrolytic, encyclopedic, monopolistic, ritualistic, unscientific
6 Syllables: UUUUSU
7 Syllables: UUUUUSU
Found 124 words across 7 groupings. Skipped 26 excess words of a similar stem.