Or search: fry, kid, pod, tike, tyke, nipper, shaver, goober, arachis, tiddler, nestling, earthnut, groundnut, youngster, insignificant
2 Syllables: SU
briefest, ceded, cheapest, cheated, chiefest, dearest, deepest, Egypt, Enoch, epoch, greeted, heated, heeded, Hesiod, keenest, leaflet, meanest, nearest, needed, peanuts, pleaded, reflux, seated, secret, spirit, sweetest, syrup, treated, weakest, yielded, zealots
3 Syllables: USU
completed, conceited, defeated, deleted, exceeded, extremest, extremists, immediate, machinist, preceded, proceeded, receded, repeated, retreated, secreted, severest, sincerest, succeeded
4 Syllables: UUSU
superseded

Found 50 words across 3 groupings. Skipped 2 excess words of a similar stem.