serviette vs bib

serviette and bib both are nouns.

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

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

serviette: a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing
bib: a napkin tied under the chin of a child while eating

Other hyponyms of serviette include dinner napkin, tea napkin.

serviette (noun)	bib (noun)
a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing	a napkin tied under the chin of a child while eating
	top part of an apron; covering the chest

serviette (verb)	bib (verb)
	drink moderately but regularly