flirt vs sex activity

flirt and sex activity both are nouns.

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

flirt (noun)	sex activity (noun)
playful behavior intended to arouse sexual interest	activities associated with sexual intercourse
a seductive woman who uses her sex appeal to exploit men

flirt (verb)	sex activity (verb)
talk or behave amorously, without serious intentions
behave carelessly or indifferently