napery vs serviette

napery and serviette both are nouns.

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

As nouns, serviette is a hyponym of napery; that is, serviette is a word with a more specific, narrower meaning than napery:

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

Other hyponyms of napery include damask, napkin, table napkin, place mat, tablecloth, tray cloth.

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