constitutional vs essential

constitutional and essential both are nouns.

Word	Noun	Adjective	Verb	Adverb
constitutional	Yes	Yes	No	No
essential	Yes	Yes	No	No

constitutional (noun)	essential (noun)
a regular walk taken as a form of exercise	anything indispensable

constitutional (adjective)	essential (adjective)
sanctioned by or consistent with or operating under the law determining the fundamental political principles of a government	basic and fundamental
of benefit to or intended to benefit your physical makeup	defining rights and duties as opposed to giving the rules by which rights and duties are established
constitutional in the structure of something (especially your physical makeup)	being or relating to or containing the essence of a plant etc
existing as an essential constituent or characteristic	of the greatest importance
	absolutely necessary; vitally necessary