rare vs scarce

rare and scarce both are adjectives.

Word	Noun	Adjective	Verb	Adverb
rare	No	Yes	No	No
scarce	No	Yes	No	Yes

rare (adjective)	scarce (adjective)
marked by an uncommon quality; especially superlative or extreme of its kind	deficient in quantity or number compared with the demand
recurring only at long intervals
(of meat) cooked a short time; still red inside
not widely distributed
having low density
not widely known; especially valued for its uncommonness

rare (adverb)	scarce (adverb)
	only a very short time before
	almost not