Or search: scrap, combat, contend
1 Syllable: S
2 Syllables: SU
2 Syllables: US
3 Syllables: SUU
3 Syllables: USU
3 Syllables: UUS
4 Syllables: UUSU
4 Syllables: UUUS

Found 404 words across 8 groupings. Skipped 203 excess words of a similar stem.