Synonyms and related words :
disability, disablement, disqualification, imbecility, inability, inadeptness, inadequacy, inaptitude, inaptness, inattentiveness, incapability, incapacitation, incapacity, incompetence, incompetency, indexterity, ineffectiveness, ineffectuality, ineptitude, ineptness, infancy, inferiority, insufficiency, legal incapacity, maladjustment, maladroitness, mediocrity, minority, pedestrianism, rustiness, skill-lessness, thoughtlessness, unaptness, uncleverness, undeftness, undexterousness, undextrousness, unfitness, unfittedness, unintelligence, unproficiency, unschooledness, unskillfulness, untrainedness, wardship