Big Huge Thesaurus

inefficacy

noun

• inefficaciousness
• ineffectiveness
• ineffectuality
• ineffectualness

antonyms

• efficacy

sounds kind of like

• iambic
• iambus
• impasse
• impeach
• impious
• impish
• impose
• in a big way
• in a pig's eye
• in vogue
• inefficacious
• infix
• infuse
• inveigh
• invoice
• invoke