table linen vs napkin

table linen and napkin both are nouns.

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

As nouns, napkin is a hyponym of table linen; that is, napkin is a word with a more specific, narrower meaning than table linen:

table linen: linens for the dining table
napkin: 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 table linen include damask, serviette, table napkin, place mat, tablecloth, tray cloth.

table linen (noun)	napkin (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
	garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement