efficient vs efficacious

efficient and efficacious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
efficient	No	Yes	No	No
efficacious	No	Yes	No	No

efficient (adjective)	efficacious (adjective)
being effective without wasting time or effort or expense	marked by qualities giving the power to produce an intended effect
able to accomplish a purpose; functioning effectively	producing or capable of producing an intended result or having a striking effect