tortuousness vs tortuosity

tortuousness and tortuosity both are nouns.

Word	Noun	Adjective	Verb	Adverb
tortuousness	Yes	No	No	No
tortuosity	Yes	No	No	No

As nouns, tortuousness and tortuosity are synonyms defined as:

Other synonyms of tortuousness include contortion, crookedness, torsion.

tortuousness (noun)	tortuosity (noun)
puzzling complexity	a tortuous and twisted shape or position
a tortuous and twisted shape or position