abstruseness vs abstrusity

abstruseness and abstrusity both are nouns.

Word	Noun	Adjective	Verb	Adverb
abstruseness	Yes	No	No	No
abstrusity	Yes	No	No	No

As nouns, abstruseness and abstrusity are synonyms defined as:

abstruseness and abstrusity: wisdom that is recondite and abstruse and profound

Other synonyms of abstruseness include profoundness, profundity, reconditeness.

abstruseness (noun)	abstrusity (noun)
the quality of being unclear or abstruse and hard to understand	wisdom that is recondite and abstruse and profound
wisdom that is recondite and abstruse and profound