napkin vs napery

napkin and napery both are nouns.

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

As nouns, napery is a hypernym of napkin; that is, napery is a word with a broader meaning than napkin:

napkin: a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing
napery: linens for the dining table

Other hypernyms of napkin include table linen.

napkin (noun)	napery (noun)
a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing	linens for the dining table
garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement