Or search: antacid, hostile, alienating, incompatible, antipathetic, antiphlogistic, antipathetical
2 Syllables: SU
billet, Bridget, civic, clearest, clinic, cricket, critic, cynic, digit, district, drifted, finished, gibbet, gifted, lifted, limits, listed, livid, lyric, mimic, mystic, mythic, Philip, Phillip, physic, picket, quickest, rhythmic, rickets, rigid, shifted, sifted, spirit, thickest, thicket, thinnest, ticket, twisted, visit, vivid
3 Syllables: USU
artistic, assisted, consisted, desisted, diminished, elicit, enlisted, exhibit, idyllic, insisted, linguistic, Pacific, persisted, prolific, realistic, resisted, revisit, satiric, Semitic, simplistic, solicit, specific, statistic, stylistic, subsisted, terrific, unfinished
4 Syllables: UUSU
altruistic, analytic, atheistic, Calvinistic, catalytic, communistic, fatalistic, hieroglyphic, humanistic, idealistic, impolitic, journalistic, logarithmic, mechanistic, metaphysics, monolithic, nationalistic, naturalistic, optimistic, panegyric, paralytic, parasitic, pessimistic, rationalistic, scientific, socialistic, unassisted, undiminished, unrealistic
5 Syllables: UUUSU
capitalistic, characteristic, electrolytic, monopolistic, ritualistic, unscientific
6 Syllables: UUUUSU
imperialistic, materialistic, psychoanalytic
7 Syllables: UUUUUSU
individualistic

Found 106 words across 6 groupings. Skipped 21 excess words of a similar stem.