Or search: perky, chirpy, floaty, cheerful
2 Syllables: SU
moisten, noisome, ointment, poignant, poison, toilsome
3 Syllables: USU
annoyance, appointment, avoidance, deployment, employment, enjoyment, flamboyant
4 Syllables: UUSU
disappointment, unemployment

Found 15 words across 3 groupings. Skipped 8 excess words of a similar stem.