napkin vs table linen

napkin and table linen both are nouns.

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

As nouns, table linen is a hypernym of napkin; that is, table linen 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
table linen: linens for the dining table

Other hypernyms of napkin include napery.

napkin (noun)	table linen (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