tortuous vs winding

tortuous is not a noun while winding is a noun.

Word	Noun	Adjective	Verb	Adverb
tortuous	No	Yes	No	No
winding	Yes	Yes	No	No

As adjectives, tortuous and winding are synonyms defined as:

Other synonyms of tortuous include twisting, twisty, voluminous.

tortuous (noun)	winding (noun)
	the act of winding or twisting

tortuous (adjective)	winding (adjective)
highly complex or intricate and occasionally devious	marked by repeated turns and bends
marked by repeated turns and bends	of a path e.g.
not straightforward