slanginess vs familiarity

slanginess and familiarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
slanginess	Yes	No	No	No
familiarity	Yes	No	No	No

As nouns, familiarity is a hypernym of slanginess; that is, familiarity is a word with a broader meaning than slanginess:

Other hypernyms of slanginess include casualness.

slanginess (noun)	familiarity (noun)
casualness in use of language	an act of undue intimacy
	usualness by virtue of being familiar or well known
	close or warm friendship
	a casual manner
	personal knowledge or information about someone or something