backbiter

adversary agent antagonist attacker bandit competitor criminal detractor foe guerrilla invader murderer opponent opposition prosecutor rebel rival spy terrorist traitor villain

assailant assassin betrayer contender defamer defiler disputant emulator falsifier informer inquisitor revolutionary saboteur slanderer traducer vilifier

archenemy asperser bad person calumniator fifth column other side seditionist

ally associate friend helper law police supporter

aide assistant confidante

battle-ax bitch carper detractor dragon fire-eater fishwife fury harpy harridan hellion muckraker nag ogress porcupine scold she-devil spitfire termagant tigress virago vixen

calumniator hell cat reviler she-wolf vituperator