sex vs napkin

sex and napkin both are nouns.

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

sex (noun)	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	garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement
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)	napkin (verb)
tell the sex (of young chickens)
to evoke sexual feelings