Or search: pathetically
3 Syllables: SUU
amiably, bigotry, dignities, dignity, fitfully, hideously, idiocy, rickety, seriously, victory, wistfully
3 Syllables: UUS
agreeably
4 Syllables: USUU
acidity, antipodes, antiquities, antiquity, deliberately, fluidity, humidity, indignities, indignity, insidiously, invariably, materially, morbidity, mysteriously, predictably, rapidity, rigidity, solidity, timidity
4 Syllables: UUUS
disagreeably
5 Syllables: UUSUU
contradictory, ignominiously

Found 34 words across 5 groupings.