Vacillated, past participle of vacillate. Synonyms in the same form.
Waver
wavered, fluctuated, hesitated, tottered, doubted, swayed, faltered, fluttered, wobbled, rocked, reeled, shilly-shallied, careened
Oscillate
oscillated, vibrated, hovered
Other
staggered, flip-flopped, waffled, whiffled
All synonyms for vacillate →