Or search: reverie, daydream, dreaming, oneirism, abstraction
2 Syllables: SU
every, feathery
3 Syllables: SUU
Beverly, charities, Chesterfield, cleverly, destinies, elegies, enemies, enemy's, evergreen, Genevieve, heresies, jealousies, leathery, legacies, lethargy, melodies, memories, parodies, pedigrees, Pericles, recipes, remedies, reverie, treachery, treasuries, treasury, verities, westerly, yesterday, yesterday's
4 Syllables: USUU
accessories, accessory, amenities, barbarities, disparities, extremities
5 Syllables: UUSUU
similarities
6 Syllables: UUUSUU
irregularities, peculiarities

Found 41 words across 5 groupings. Skipped 1 excess word of a similar stem.