Or search: humor, humour, whey
1 Syllable: S
2 Syllables: SU
2 Syllables: US
3 Syllables: SUU
3 Syllables: USU
4 Syllables: UUSU
5 Syllables: UUUSU

Found 320 words across 7 groupings. Skipped 133 excess words of a similar stem.