The Collaborative International Dictionary of English v.0.48:

Unrealized \Unrealized\
   See realized.

WordNet (r) 3.0 (2006):

unrealized
    adj 1: of persons; marked by failure to realize full
           potentialities; "unfulfilled and uneasy men"; "unrealized
           dreams and ambitions" [syn: unfulfilled, unrealized,
           unrealised]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "unrealized":
   behind the curtain, behind the scenes, camouflaged, concealed,
   disguised, hidden, imperceptible, indiscernible, insensible,
   invisible, latent, neglected, out of sight, secret, sightless,
   submerged, unaccomplished, unachieved, unapparent, unattained,
   unbeheld, unbeholdable, uncompleted, unconsummated, undiscernible,
   undischarged, undone, unexecuted, unfinished, unfulfilled,
   unnoticed, unobserved, unperceivable, unperceived, unperformed,
   unseeable, unseen, unviewed, unwitnessed, viewless