Impugner

(n.) One who impugns.

Thesaurus Entries

accusant, accuser, allegator, appellant, applicant, aspirant, bidder, candidate, complainant, delator, impeacher, impugner, indictor, informer, libelant, party, petitioner, plaintiff, postulant, prosecutor, seeker, solicitant, solicitor, suitor, suppliant, supplicant, the prosecution