1 Syllable: S
book, brook, Brooke, Brooks, bush, cook, Cooke, Cook's, could, crook, foot, Foote, good, hood, hoofs, hook, look, nook, ould, plus, push, puss, put, roof, rook, routes, shook, should, shouldst, soot, stood, took, Tooke, wood, would, wouldst
2 Syllables: US
3 Syllables: UUS
4 Syllables: UUUS

Found 50 words across 4 groupings. Skipped 17 excess words of a similar stem.