dearth vs lack

dearth and lack both are nouns.

Word	Noun	Adjective	Verb	Adverb
dearth	Yes	No	No	No
lack	Yes	No	Yes	No

As nouns, lack is a hypernym of dearth; that is, lack is a word with a broader meaning than dearth:

Other hypernyms of dearth include deficiency, want.

dearth (noun)	lack (noun)
an insufficient quantity or number	the state of needing something that is absent or unavailable
an acute insufficiency

dearth (verb)	lack (verb)
	be without
	To be insufficiently prepared