oddment vs rarity

oddment and rarity both are nouns.

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

As nouns, oddment and rarity are synonyms defined as:

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

oddment (noun)	rarity (noun)
a piece of cloth that is left over after the rest has been used or sold	something unusual -- perhaps worthy of collecting
something unusual -- perhaps worthy of collecting	a rarified quality
	noteworthy scarcity