efficient vs effectual

efficient and effectual both are adjectives.

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

efficient (adjective)	effectual (adjective)
being effective without wasting time or effort or expense	producing or capable of producing an intended result or having a striking effect
able to accomplish a purpose; functioning effectively	having legal efficacy or force