WordNet (r) 3.0 (2006):

maladjusted
    adj 1: poorly adjusted to demands and stresses of daily living;
           "a maladjusted child" [ant: adjusted]
    2: emotionally unstable and having difficulty coping with
       personal relationships [syn: disturbed, maladjusted]
    3: not well adjusted; "a maladjusted carburetor"

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "maladjusted":
   ill-adapted, ill-assorted, ill-chosen, ill-fitted, ill-matched,
   ill-qualified, ill-sorted, ill-suited, ill-timed, improper,
   inadequate, inadmissible, inapplicable, inapposite, inappropriate,
   inapt, incapable, incompetent, ineffective, ineffectual, inept,
   infelicitous, irrelevant, mal a propos, malapropos, misjoined,
   mismatched, mismated, misplaced, not equal to, not up to,
   out of character, out of joint, out of keeping, out of line,
   out of place, out of proportion, out of season, out of time,
   out of tune, unable, unadapted, unadjusted, unapt, unbecoming,
   unbefitting, unequipped, unfit, unfitted, unfitting, unqualified,
   unseasonable, unseemly, unsuitable, unsuited, untimely