opponent detractor antagonist adversary critic enemy decrier opposition opposer censurer caviller disparager knocker castigator caviler disapprover muckraker foe accuser protestor faultfinder carper censor aristarch assailant rival attacker reviler slanderer disputer maligner panner manager leader boss chief master superior owner employee rear danger hazard menace peril risk threat problem endangerment imperilment concern liability distress destroyer hunter huntsman huntswoman huntress chaser stalker trapper predator killer villain nemesis supervillain bystander gaper observer onlooker passerby witness