scarce vs rare

scarce and rare both are adjectives.

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

scarce (adjective)	rare (adjective)
deficient in quantity or number compared with the demand	marked by an uncommon quality; especially superlative or extreme of its kind
	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

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