sex vs tail end

sex and tail end both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
tail end	Yes	No	No	No

sex (noun)	tail end (noun)
activities associated with sexual intercourse	the fleshy part of the human body that you sit on
the properties that distinguish organisms on the basis of their reproductive roles	any projection that resembles the tail of an animal
all of the feelings resulting from the urge to gratify sexual impulses	the time of the last part of something
either of the two categories (male or female) into which most organisms are divided

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