want vs requirement

want and requirement both are nouns.

Word	Noun	Adjective	Verb	Adverb
want	Yes	No	Yes	No
requirement	Yes	No	No	No

As nouns, requirement is a hypernym of want; that is, requirement is a word with a broader meaning than want:

Other hypernyms of want include essential, necessary, necessity, requisite.

want (noun)	requirement (noun)
a specific feeling of desire	something that is required in advance
anything that is necessary but lacking	required activity
a state of extreme poverty	anything indispensable
the state of needing something that is absent or unavailable

want (verb)	requirement (verb)
wish or demand the presence of
have need of
hunt or look for; want for a particular reason
feel or have a desire for; want strongly
be without, lack; be deficient in