powerful vs effectual

powerful and effectual both are adjectives.

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

powerful (adjective)	effectual (adjective)
having great power or force or potency or effect	producing or capable of producing an intended result or having a striking effect
having great influence	having legal efficacy or force
displaying superhuman strength or power
(of a person) possessing physical strength and weight; rugged and powerful
strong enough to knock down or overwhelm

powerful (adverb)	effectual (adverb)
(Southern regional intensive) very; to a great degree