Or search: divinity, oblivion, theology, obscurity
2 Syllables: SU
brimstone, impost, Indo, inflow, info, inmost, inroad, intro, kinsfolk, primrose, syndrome, window, Winslow
3 Syllables: USU
Domingo

Found 14 words across 2 groupings. Skipped 2 excess words of a similar stem.