Synonyms of inefficiency

3 Syllables
inaptness, skimpiness, worthlessness, ineptness, faultiness
4 Syllables
powerlessness, carelessness, wastefulness, defalcation
5 Syllables
incompleteness, inadequacy, inadequacies, incompetency, inaptitude, inutility, inability, defectiveness
6 Syllables
disorganization, incapability, incapacitation