The Collaborative International Dictionary of English v.0.48:

Misjudgment \Mis*judg"ment\, n. [Written also misjudgement.]
   A wrong or unjust judgment.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "misjudgment":
   aberrancy, aberration, abuse of terms, catachresis, clerical error,
   contorting, corrigendum, defectiveness, delusion, deviancy,
   distortion, eisegesis, errancy, erratum, erroneousness, error,
   failure, fallaciousness, fallacy, falseness, falsity, fault,
   faultiness, faute, flaw, flawedness, garbling, gloss, hamartia,
   heresy, heterodoxy, human error, illusion, malentendu,
   malobservation, misapplication, misapprehension, miscalculation,
   miscarriage, miscitation, misconception, misconstruction, miscount,
   misdeal, misdoing, misexplanation, misexplication, misexposition,
   misfeasance, misidentification, misintelligence, misinterpretation,
   misplay, misprint, misquotation, misreading, misrendering,
   misreport, miss, misstatement, mistake, mistranslation,
   misunderstanding, misuse, misuse of words, peccancy, perversion,
   self-contradiction, sin, sinfulness, squeezing, torturing,
   twisting, typo, typographical error, unorthodoxy, untrueness,
   untruth, untruthfulness, wrenching, wrong, wrongness