Accuser

(n.) One who accuses; one who brings a charge of crime or fault.

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