Or search: fox, mar, pip, spy, tip, blob, blot, daub, espy, fret, lamp, peak, plum, pool, slur
1 Syllable: S
2 Syllables: SU
cannot, Punjab
2 Syllables: US
3 Syllables: UUS

Found 250 words across 4 groupings. Skipped 71 excess words of a similar stem.