want vs shortage

want and shortage both are nouns.

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

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

Other hyponyms of want include absence, dearth, famine, deficit, mineral deficiency, shortness, stringency, tightness.

want (noun)	shortage (noun)
a specific feeling of desire	the property of being an amount by which something is less than expected or required
anything that is necessary but lacking	an acute insufficiency
a state of extreme poverty
the state of needing something that is absent or unavailable

want (verb)	shortage (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