Or search: accidentally, circumstantially
3 Syllables: SUU
Hebrides, technically
4 Syllables: SUUU
effectively
4 Syllables: USUU
aesthetically, celebrities, celebrity, collectively, complexities, complexity, electrically, genetically, hermetically, objectively, pathetically, perceptibly, perplexities, poetically, respectively, selectively, subjectively, symmetrically
5 Syllables: UUSUU
alphabetically, diametrically, energetically, geometrically, imperceptibly, parenthetically, sympathetically, theoretically
6 Syllables: UUUSUU
apologetically

Found 30 words across 5 groupings.