quirkiness vs strangeness

quirkiness and strangeness both are nouns.

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

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

Other hypernyms of quirkiness include unfamiliarity.

quirkiness (noun)	strangeness (noun)
a strange attitude or habit	unusualness as a consequence of not being well known
	the quality of being alien or not native
	(physics) one of the six flavors of quark, the third lightest of all quarks