Or search: gauge, guess, assess, cipher, cypher, esteem, reckon, compute, lowball, scalage, figuring, forecast, guessing, truncate, misgauge
4 Syllables: SUUU
animating, celebrating, decorating, deprecating, desolating, devastating, educating, elevating, emanating, emigrating, generating, hesitating, intimating, meditating, penetrating, separating
5 Syllables: USUUU
accelerating, commemorating, degenerating, disseminating, investigating, perpetuating, regenerating

Found 23 words across 2 groupings.