The Collaborative International Dictionary of English v.0.48:

Nonfulfillment \Non`ful*fill"ment\, n.
   Neglect or failure to fulfill.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "nonfulfillment":
   Sisyphean labor, default, delinquency, dereliction, disconformity,
   disregard, endless task, failure, falling short, inadequacy,
   inadequateness, inattention, incompetence, inexecution,
   inobservance, insufficiency, insufficientness, laxity, loose ends,
   neglect, negligence, nonaccomplishment, nonachievement,
   nonadherence, noncompliance, nonconformance, nonconformity,
   nonconsummation, nondischarging, none to spare, nonexecution,
   nonfeasance, nonobservance, nonperformance, nonsatisfaction,
   omission, oversight, rough edges, short supply, slight, too late,
   too little, unfulfillment, unobservance, unqualification,
   unsuitability, work of Penelope