sex vs flirt

sex and flirt both are nouns.

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

sex (noun)	flirt (noun)
activities associated with sexual intercourse	playful behavior intended to arouse sexual interest
the properties that distinguish organisms on the basis of their reproductive roles	a seductive woman who uses her sex appeal to exploit men
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

sex (verb)	flirt (verb)
tell the sex (of young chickens)	talk or behave amorously, without serious intentions
to evoke sexual feelings	behave carelessly or indifferently