Or search: sorely, distressingly
3 Syllables: SUU
aimlessly, amiably, anciently, daintily, faithfully, fatally, gracefully, gratefully, hastily, playfully, racially, shamefully, shamelessly, specialty, tastefully
4 Syllables: USUU
disdainfully, spontaneously
5 Syllables: UUSUU
educationally, interchangeably, simultaneously
6 Syllables: UUUSUU
contemporaneously

Found 21 words across 4 groupings.