extracurricular vs sex activity

extracurricular is not a noun while sex activity is a noun.

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

extracurricular (noun)	sex activity (noun)
	activities associated with sexual intercourse

extracurricular (adjective)	sex activity (adjective)
characterized by adultery
outside the regular duties of your job or profession
outside the regular academic curriculum