Or search: tapestry, involution, knottiness, trickiness, elaboration, complexness, complication
3 Syllables: SUU
Hebrides, technically
4 Syllables: USUU
aesthetically, celebrities, celebrity, complexity, electrically, genetically, hermetically, pathetically, perceptibly, perplexities, poetically, symmetrically
5 Syllables: UUSUU
alphabetically, diametrically, energetically, geometrically, imperceptibly, parenthetically, sympathetically, theoretically, unexpectedly
6 Syllables: UUUSUU
apologetically

Found 24 words across 4 groupings.