curiosity vs rarity

curiosity and rarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
curiosity	Yes	No	No	No
rarity	Yes	No	No	No

As nouns, curiosity and rarity are synonyms defined as:

Other synonyms of curiosity include curio, oddity, oddment, peculiarity.

curiosity (noun)	rarity (noun)
something unusual -- perhaps worthy of collecting	something unusual -- perhaps worthy of collecting
a state in which you want to learn more about something	a rarified quality
	noteworthy scarcity