sex vs brothel

sex and brothel both are nouns.

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

sex (noun)	brothel (noun)
activities associated with sexual intercourse	a building where prostitutes are available
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)	brothel (verb)
tell the sex (of young chickens)
to evoke sexual feelings