Or search: accumulator, pole, terminal, tube
2 Syllables: SU
ambrose, anglo, anno, ano, campo, canto, cathode, franco, hallowed, mango, sandstone, santo, shadowed, stanhope
3 Syllables: USU
fernando, foreshadowed, orlando, piano, portmanteau, soprano, unhallowed
4 Syllables: UUSU
overshadowed

Found 22 words across 3 groupings. Skipped 2 excess words of a similar stem.