sex vs period

sex and period both are nouns.

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

sex (noun)	period (noun)
activities associated with sexual intercourse	a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
the properties that distinguish organisms on the basis of their reproductive roles	the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
all of the feelings resulting from the urge to gratify sexual impulses	an amount of time
either of the two categories (male or female) into which most organisms are divided	the interval taken to complete one cycle of a regularly repeating phenomenon
	a unit of geological time during which a system of rocks formed
	the end or completion of something
	(ice hockey) one of three divisions into which play is divided in hockey games

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