requisite vs essential

requisite and essential both are nouns.

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

As nouns, requisite and essential are synonyms defined as:

Other synonyms of requisite include necessary, necessity, requirement.

requisite (noun)	essential (noun)
anything indispensable	anything indispensable

requisite (adjective)	essential (adjective)
necessary for relief or supply	basic and fundamental
	defining rights and duties as opposed to giving the rules by which rights and duties are established
	being or relating to or containing the essence of a plant etc
	of the greatest importance
	absolutely necessary; vitally necessary