legal vs effectual

legal and effectual both are adjectives.

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

As adjectives, legal and effectual are synonyms defined as:

Other synonyms of legal include sound.

legal (adjective)	effectual (adjective)
established by or founded upon law or official or accepted rules	producing or capable of producing an intended result or having a striking effect
of or relating to jurisprudence	having legal efficacy or force
relating to or characteristic of the profession of law
allowed by official rules
having legal efficacy or force