Synonyms of impugning

1 Syllable
knock, break, slam, cross, zing, smear, trash, zap, tar, blast
2 Syllables
deny, resist, question, gainsay, naysaying, coner, assail, attack
3 Syllables
traduce, dispute, traverse, dissentient, oppose, contradict, disaffirm, negate
4 Syllables
negative, contravene, privative
6 Syllables
unaffirmative