Or search: conductivity
2 Syllables: SU
button, buxom, Buxton, duction, Dutton, glutton, Hudson, Hudson's, Hutton, mutton, Putnam, Putnam's, Rutland, substance, suction, sudden, suppliant, Sutton, twopence, upland, Upton
3 Syllables: USU
4 Syllables: UUSU

Found 45 words across 3 groupings. Skipped 16 excess words of a similar stem.