curiosity vs curio

curiosity and curio both are nouns.

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

As nouns, curiosity and curio are synonyms defined as:

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

curiosity (noun)	curio (noun)
something unusual -- perhaps worthy of collecting	something unusual -- perhaps worthy of collecting
a state in which you want to learn more about something