curio vs oddity

curio and oddity both are nouns.

Word	Noun	Adjective	Verb	Adverb
curio	Yes	No	No	No
oddity	Yes	No	No	No

As nouns, curio and oddity are synonyms defined as:

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

curio (noun)	oddity (noun)
something unusual -- perhaps worthy of collecting	something unusual -- perhaps worthy of collecting
	a strange attitude or habit
	eccentricity that is not easily explained