terror
noun
1 Ruth screamed in terror:
extreme fear, dread, horror, fear and trembling, fright, trepidation, alarm, panic, shock;
informal funk.
2 she plunged into everyday activity to save herself from the terrors of her own mind:
demon, fiend, devil, monster;
horror, nightmare.
3 informal he turned out to be a right little terror:
rascal, devil, imp, monkey, wretch, scamp, mischief-maker, troublemaker;
informal horror, holy terror;
British, informal perisher;
Irish, informal spalpeen;
Northern English, informal tyke, scally;
North American, informal varmint, hellion;
archaic scapegrace, rapscallion.