sex vs gestation period

sex and gestation period both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
gestation period	Yes	No	No	No

sex (noun)	gestation period (noun)
activities associated with sexual intercourse	the period during which an embryo develops (about 266 days in humans)
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)	gestation period (verb)
tell the sex (of young chickens)
to evoke sexual feelings