oddment vs oddity

oddment and oddity both are nouns.

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

As nouns, oddment and oddity are synonyms defined as:

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

oddment (noun)	oddity (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 strange attitude or habit
	eccentricity that is not easily explained