Synonyms for Inefficacious

Synonyms starting with letter I

• ineffective

  affect, ineffectual
• inefficient

  affect, ineffective, ineffectual
• ineffectual

  ineffective, affect
• inadequate

  ineffectual
• inept

  ineffectual, ineffective
• idle

  ineffectual
• inoperative
• impotent
• incompetent
• invalid
• indecisive
• inferior
• innocuous
• incapable
• inexpert
• impractical
• invertebrate
• impossible
• improvident
• in vain
• insignificant
• in vicious circle
• incapacitated
• impuissant
• ivory-tower
• idealistic
• illogical
• impracticable
• improbable
• inapplicable