sexiness vs sex

sexiness and sex both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexiness	Yes	No	No	No
sex	Yes	No	Yes	No

sexiness (noun)	sex (noun)
The state or quality of being sexy, of possessing the traits of sexual appeal.	activities associated with sexual intercourse
the arousal of feelings of sexual desire	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

sexiness (verb)	sex (verb)
	tell the sex (of young chickens)
	to evoke sexual feelings