3 Syllables: SUU
courteously, curiously, gloriously, hideously, obviously, pleurisy, previously, seriously, studiously, variously
4 Syllables: USUU
erroneously, harmoniously, imperiously, industriously, injuriously, insidiously, laboriously, luxuriantly, luxuriously, mysteriously, notoriously, precariously, spontaneously, victoriously
5 Syllables: UUSUU
ignominiously, instantaneously, simultaneously
6 Syllables: UUUSUU
contemporaneously, unceremoniously

Found 29 words across 4 groupings.