Or search: prejudiced, antifeminist, discriminatory
2 Syllables: SU
checklist, fetish, hectic, reddish, sceptic, septic, sexes, skeptics, wreckage
3 Syllables: SUU
effective
3 Syllables: USU
affective, Alexis, collective, connective, corrective, deceptive, defective, detective, directive, eclectic, elective, electorate, electric, invective, objective, perceptive, perspective, prospective, protective, receptive, reflective, respective, selective, subjective
4 Syllables: UUSU
antiseptic, dialectic, epileptic, ineffective, introspective, irrespective, Polytechnic, retrospective

Found 42 words across 4 groupings. Skipped 7 excess words of a similar stem.