erection vs sex

erection and sex both are nouns.

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

erection (noun)	sex (noun)
the act of building or putting up	activities associated with sexual intercourse
a structure that has been erected	the properties that distinguish organisms on the basis of their reproductive roles
an erect penis	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

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