The Collaborative International Dictionary of English v.0.48:

Noncompletion \Non`com*ple"tion\, n.
   Lack of completion; failure to complete.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "noncompletion":
   Sisyphean labor, endless task, failure, inexecution, loose ends,
   neglect, nonaccomplishment, nonachievement, nonconsummation,
   nondischarging, nonexecution, nonfeasance, nonfulfillment,
   nonperformance, omission, rough edges, unfulfillment,
   work of Penelope