lingual vein vs mouth

lingual vein and mouth both are nouns.

Word	Noun	Adjective	Verb	Adverb
lingual vein	Yes	No	No	No
mouth	Yes	No	Yes	No

lingual vein (noun)	mouth (noun)
a vein that receives blood from the tongue and the floor of the mouth and empties into the internal jugular or the facial vein	the opening of a jar or bottle
	the externally visible part of the oral cavity on the face and the system of organs surrounding the opening
	the opening through which food is taken in and vocalizations emerge
	an impudent or insolent rejoinder
	the point where a stream issues into a larger body of water
	an opening that resembles a mouth (as of a cave or a gorge)
	a person conceived as a consumer of food
	a spokesperson (as a lawyer)

lingual vein (verb)	mouth (verb)
	express in speech
	articulate silently; form words with the lips only
	touch with the mouth