Or search: athletics
2 Syllables: SU
clinic, cynic, English, hinted, interests, kindred, kingship, kinship, limits, limpid, linguist, mimic, pinkish, printed, stinted, thinness, timid, tinted, winded
3 Syllables: USU
distinguish, extinguish, extrinsic, imprinted, intrinsic, Olympic, relinquish, reprinted, rescinded
4 Syllables: UUSU
undistinguished

Found 29 words across 3 groupings. Skipped 4 excess words of a similar stem.