Or search: brawn, muscle, tendon, collagen, hamstring, brawniness, muscularity
2 Syllables: SU
Hindoo, Hindu, into, issue, sinews, situ, tissue
3 Syllables: USU
continue
4 Syllables: UUSU
discontinue

Found 9 words across 3 groupings. Skipped 4 excess words of a similar stem.