The Collaborative International Dictionary of English v.0.48:

Maladjustment \Mal`ad*just"ment\, n. [Mal- + adjustment.]
   A bad adjustment.
   [1913 Webster]

WordNet (r) 3.0 (2006):

maladjustment
    n 1: the condition of being unable to adapt properly to your
         environment with resulting emotional instability

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "maladjustment":
   abnormality, anomaly, brain disease, crack-up, emotional disorder,
   emotional instability, functional nervous disorder, impropriety,
   inability, inadeptness, inadequacy, inadmissibility,
   inapplicability, inappositeness, inappropriateness, inaptitude,
   inaptness, inattentiveness, incapability, incapacity, incompetence,
   incompetency, indexterity, ineffectiveness, ineffectuality,
   inefficiency, ineptness, infelicity, insanity, irrelevance,
   irrelevancy, maladroitness, manic-depressive psychosis, mediocrity,
   melancholia, mental disorder, mental illness, mesalliance,
   misalliance, misjoinder, misjoining, mismatch, nervous breakdown,
   nervous disorder, neurosis, paranoia, pedestrianism,
   personality disorder, problems in living, psychosis, reaction,
   rustiness, schizophrenia, skill-lessness, social maladjustment,
   thoughtlessness, unaptness, uncleverness, uncongeniality,
   undeftness, undexterousness, undextrousness, unfitness,
   unfittedness, unintelligence, unproficiency, unschooledness,
   unskillfulness, unsuitability, untrainedness