sex vs table napkin

sex and table napkin both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
table napkin	Yes	No	No	No

sex (noun)	table napkin (noun)
activities associated with sexual intercourse	a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing
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)	table napkin (verb)
tell the sex (of young chickens)
to evoke sexual feelings