The Collaborative International Dictionary of English v.0.48:

Unfulfilled \Unfulfilled\
   See fulfilled.

WordNet (r) 3.0 (2006):

unfulfilled
    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:

72 Moby Thesaurus words for "unfulfilled":
   anguished, anxious, beefing, bellyaching, bitching, bored,
   cheerless, complaining, complaintful, crabbing, crabby, cranky,
   croaking, depressed, disappointed, discontented, disgruntled,
   disgusted, displeased, dissatisfied, envious, faultfinding, grim,
   griping, grouchy, grousing, growling, grumbling, joyless,
   malcontent, malcontented, murmuring, muttering, nauseated,
   nauseous, neglected, out of humor, peevish, petulant, pleasureless,
   prey to malaise, querulant, querulous, rebellious, repelled,
   resentful, restive, restless, revolted, sad, sickened,
   suffering angst, sulky, unaccepting, unaccommodating,
   unaccomplished, unachieved, unattained, uncompleted, unconsummated,
   undischarged, undone, uneasy, unexecuted, unfinished, ungratified,
   unhappy, unperformed, unquiet, unrealized, unsatisfied, whiny