sex vs call girl

sex and call girl both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
call girl	Yes	No	No	No

sex (noun)	call girl (noun)
activities associated with sexual intercourse	a female prostitute who can be hired by telephone
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

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