wind up vs sex

wind up is not a noun while sex is a noun.

Word	Noun	Adjective	Verb	Adverb
wind up	No	No	Yes	No
sex	Yes	No	Yes	No

As verbs, wind up and sex are synonyms defined as:

Other synonyms of wind up include arouse, excite, turn on.

wind up (noun)	sex (noun)
	activities associated with sexual intercourse
	the properties that distinguish organisms on the basis of their reproductive roles
	all of the feelings resulting from the urge to gratify sexual impulses
	either of the two categories (male or female) into which most organisms are divided

wind up (verb)	sex (verb)
finally be or do something	tell the sex (of young chickens)
coil the spring of (some mechanical device) by turning a stem	to evoke sexual feelings
to evoke sexual feelings
give a preliminary swing to the arm pitching