sex vs usage

sex and usage both are nouns.

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

sex (noun)	usage (noun)
activities associated with sexual intercourse	the act of using
the properties that distinguish organisms on the basis of their reproductive roles	accepted or habitual practice
all of the feelings resulting from the urge to gratify sexual impulses	the customary manner in which a language (or a form of a language) is spoken or written
either of the two categories (male or female) into which most organisms are divided

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