Or search: fete, mourn, revel, honour, racket, lionize, lionise, wassail, jubilate, solemnise, commemorate
4 Syllables: SUUU
decorating, deprecating, desolating, devastating, educating, elevating, emanating, emigrating, estimating, generating, hesitating, meditating, penetrating, separating
5 Syllables: USUUU
accelerating, commemorating, degenerating, disseminating, investigating, perpetuating, regenerating

Found 21 words across 2 groupings.