scarceness vs deficiency

scarceness and deficiency both are nouns.

Word	Noun	Adjective	Verb	Adverb
scarceness	Yes	No	No	No
deficiency	Yes	No	No	No

As nouns, deficiency is a hypernym of scarceness; that is, deficiency is a word with a broader meaning than scarceness:

Other hypernyms of scarceness include inadequacy, insufficiency.

scarceness (noun)	deficiency (noun)
a small and inadequate amount	lack of an adequate quantity or number
	the state of needing something that is absent or unavailable