The Collaborative International Dictionary of English v.0.48:

Terrify \Ter"ri*fy\, v. t. [imp. & p. p. Terrified; p. pr. &
   vb. n. Terrifying.] [L. terrere to frighten + -fy: cf. F.
   terrifier, L. terrificare. See Terrific, and -fy.]
   1. To make terrible. [Obs.]
      [1913 Webster]

            If the law, instead of aggravating and terrifying
            sin, shall give out license, it foils itself.
                                                  --Milton.
      [1913 Webster]

   2. To alarm or shock with fear; to frighten.
      [1913 Webster]

            When ye shall hear of wars . . . be not terrified.
                                                  --Luke xxi. 9.
      [1913 Webster]

WordNet (r) 3.0 (2006):

terrified
    adj 1: thrown into a state of intense fear or desperation;
           "became panicky as the snow deepened"; "felt panicked
           before each exam"; "trying to keep back the panic-
           stricken crowd"; "the terrified horse bolted" [syn:
           panicky, panicked, panic-stricken, panic-struck,
           terrified, frightened]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "terrified":
   aghast, anxious, appalled, ashen, astounded, awed, awestricken,
   awestruck, blanched, cowed, deadly pale, fearful, frightened,
   frozen, gray with fear, horrified, horror-struck, intimidated,
   pale as death, pallid, paralyzed, petrified, scared, scared stiff,
   scared to death, scary, shocked, stunned, stupefied, terror-crazed,
   terror-haunted, terror-ridden, terror-riven, terror-shaken,
   terror-smitten, terror-struck, terror-troubled, undone, unmanned,
   unnerved, unstrung