fickle vs sex

fickle is not a noun while sex is a noun.

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

fickle (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

fickle (adjective)	sex (adjective)
liable to sudden unpredictable change
marked by erratic changeableness in affections or attachments

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