valid vs effectual

valid and effectual both are adjectives.

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

valid (adjective)	effectual (adjective)
well grounded in logic or truth or having legal force	producing or capable of producing an intended result or having a striking effect
still legally acceptable	having legal efficacy or force