tortuousness vs contortion

tortuousness and contortion both are nouns.

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

As nouns, tortuousness and contortion are synonyms defined as:

Other synonyms of tortuousness include crookedness, torsion, tortuosity.

tortuousness (noun)	contortion (noun)
puzzling complexity	the act of twisting or deforming the shape of something (e.g., yourself)
a tortuous and twisted shape or position	a tortuous and twisted shape or position