requisite vs must

requisite and must both are nouns.

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

As nouns, must is a hyponym of requisite; that is, must is a word with a more specific, narrower meaning than requisite:

Other hyponyms of requisite include desideratum, need, want.

requisite (noun)	must (noun)
anything indispensable	the quality of smelling or tasting old or stale or mouldy
	grape juice before or during fermentation
	a necessary or essential thing

requisite (adjective)	must (adjective)
necessary for relief or supply	highly recommended