[1] : The Collaborative International Dictionary of English v.0.48

terror \ter"ror\, n. l. terror, akin to terrere to frighten,
   for tersere; akin to gr. ? to flee away, dread, skr. tras to
   tremble, to be afraid, russ. triasti to shake: cf. f.
   terreur. cf. deter.
   1. extreme fear; fear that agitates body and mind; violent
      dread; fright.
      1913 webster

            terror seized the rebel host.         --milton.
      1913 webster

   2. that which excites dread; a cause of extreme fear.
      1913 webster

            those enormous terrors of the nile.   --prior.
      1913 webster

            rulers are not a terror to good works. --rom. xiii.
                                                  3.
      1913 webster

            there is no terror, cassius, in your threats.
                                                  --shak.
      1913 webster

   note: terror is used in the formation of compounds which are
         generally self-explaining: as, terror-fraught,
         terror-giving, terror-smitten, terror-stricken,
         terror-struck, and the like.
         1913 webster

   king of terrors, death. --job xviii. 14.

   reign of terror. french hist. see in dictionary of noted
      names in fiction.
      1913 webster

   syn: alarm; fright; consternation; dread; dismay. see
        alarm.
        1913 webster
see also:
deter king of terrors reign of terror alarm 

[2] : WordNet (r) 2.0

terror
     n 1: an overwhelming feeling of fear and anxiety syn: panic
     2: a person who inspires fear or dread; "he was the terror of
        the neighborhood" syn: scourge, threat
     3: a very troublesome child syn: brat, little terror, holy
        terror
see also:
panic scourge threat brat little terror holy terror 

[3] : Moby Thesaurus II by Grady Ward, 1.0

116 moby thesaurus words for "terror":
   dracula, frankenstein, mafioso, wolf-man, young turk, abject fear,
   affright, alarm, anxiety, awe, beast, beldam, berserk, berserker,
   blue funk, bogey, bogeyman, bomber, bruiser, brute, bugaboo,
   bugbear, consternation, cowardice, demon, devil, dismay, dragon,
   dread, fear, fearfulness, fee-faw-fum, fiend, fire-eater,
   firebrand, fright, frightener, funk, fury, ghost, ghoul, goon,
   gorilla, gun, gunsel, hardnose, hatchet man, hell-raiser, hellcat,
   hellhound, hellion, hobgoblin, holy terror, hood, hoodlum,
   hooligan, horrification, horror, hothead, hotspur, incendiary,
   incubus, intimidation, killer, mad dog, madcap, monster, mug,
   mugger, muscle man, nightmare, ogre, ogress, panic, panic fear,
   phantom, phobia, plug-ugly, rapist, revenant, revolutionary,
   rodman, roughneck, savage, scare, scarebabe, scarecrow, scarer,
   scourge, she-wolf, shock, specter, spitfire, stampede,
   strong-arm man, succubus, termagant, terrorist, tiger, tigress,
   torpedo, tough, tough guy, trepidation, trepidity, trigger man,
   ugly customer, unholy dread, vampire, violent, virago, vixen,
   werewolf, wild beast, witch, wolf

Terror >> T Words
Terror, definition of term: Terror
terror_pag1.html

Reign Of Terror >> R Words
Reign Of Terror, definition of term: Reign Of Terror
reign+of+terror_pag1.html