sex vs pubic region

sex and pubic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
pubic region	Yes	No	No	No

sex (noun)	pubic region (noun)
activities associated with sexual intercourse	the lower part of the abdomen just above the external genital organs
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)	pubic region (verb)
tell the sex (of young chickens)
to evoke sexual feelings