4 Syllables: SUUU
aggravating, aggregating, agitating, allocating, animating, fascinating, fluctuating, navigating, vacillating
5 Syllables: USUUU
collaborating, congratulating, contaminating, elaborating, eradicating, evacuating, evaluating, evaporating, exaggerating, exasperating, extenuating, insinuating, perpetuating
Found 22 words across 2 groupings.