Synonyms of doubted

1 Syllable
fear
2 Syllables
scruple, mistrust, query, distrust, impugn, misdoubt, suspect, waver, demur
3 Syllables
challenge, surmise, misgive, dispute, discredit, fluctuate
4 Syllables
hesitate, insinuate, disbelieve, skepticize, imagine, vacillate, shilly-shally