requirement vs want

requirement and want both are nouns.

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

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

Other hyponyms of requirement include desideratum, must, need.

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

requirement (verb)	want (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