sex vs oral sex

sex and oral sex both are nouns.

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

sex (noun)	oral sex (noun)
activities associated with sexual intercourse	oral stimulation of the genitals
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)	oral sex (verb)
tell the sex (of young chickens)
to evoke sexual feelings