The Collaborative International Dictionary of English v.0.48:

panicky \pan"ick*y\ adj.
   Same as panic-stricken; as, the travellers became panicky
   as the snow deepened.

   Syn: panic-stricken, panic-struck, petrified, terrified,
        frightened.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

panicky
    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:

53 Moby Thesaurus words for "panicky":
   afraid, all nerves, apprehensive, chicken, chickenhearted, coward,
   cowardly, cowed, daunted, dismayed, edgy, excitable, fainthearted,
   fearful, frightened, funking, funky, henhearted, high-strung,
   in a panic, intimidated, irritable, lily-livered, milk-livered,
   milksoppish, milksoppy, mousy, nerves on edge, nervous, nervy,
   on edge, overstrung, overtimid, overtimorous, panic-prone,
   panic-stricken, panic-struck, panicked, pigeonhearted, rabbity,
   sissified, sissy, soft, timid, timorous, uneasy, unmanly, unmanned,
   weak, weak-kneed, weakhearted, white-livered, yellow