want vs crave

want is a noun but crave is not a noun.

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

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

want (noun)	crave (noun)
a specific feeling of desire
anything that is necessary but lacking
a state of extreme poverty
the state of needing something that is absent or unavailable

want (verb)	crave (verb)
wish or demand the presence of	plead or ask for earnestly
have need of	have a craving, appetite, or great desire for
hunt or look for; want for a particular reason
feel or have a desire for; want strongly
be without, lack; be deficient in