oddity vs strangeness

oddity and strangeness both are nouns.

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

As nouns, strangeness is a hypernym of oddity; that is, strangeness is a word with a broader meaning than oddity:

Other hypernyms of oddity include unfamiliarity.

oddity (noun)	strangeness (noun)
something unusual -- perhaps worthy of collecting	unusualness as a consequence of not being well known
a strange attitude or habit	the quality of being alien or not native
eccentricity that is not easily explained	(physics) one of the six flavors of quark, the third lightest of all quarks