Or search: font, basin, baptistry
2 Syllables: SU
actually
3 Syllables: SUU
apathy, atrophy, factory, laxity, magazine, rhapsody, Saxony, strategies, strategy, tactfully, tapestries, tapestry
4 Syllables: USUU
olfactory, refractory
4 Syllables: UUSU
satisfactory
5 Syllables: UUSUU
manufactory, satisfactorily
6 Syllables: UUUSUU
unsatisfactory

Found 19 words across 6 groupings. Skipped 1 excess word of a similar stem.