3 Syllables: SUU
Avery, bakery, bravery, daintily, drapery, faithfully, favorably, gracefully, graciously, granary, gratefully, halfpenny, hastily, knavery, laity, painfully, Papacy, playfully, racially, raillery, savory, savoury, shamefully, slavery, specialty, tastefully, tracery
4 Syllables: USUU
chicanery, courageously, disdainfully, outrageously, tenaciously, unsavory
5 Syllables: UUSUU
advantageously, educationally, ostentatiously, quantitatively, unmistakably
6 Syllables: UUUUUS
heterogeneity

Found 39 words across 4 groupings.