mouth vs teeth

mouth and teeth both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouth	Yes	No	Yes	No
teeth	Yes	No	No	No

mouth (noun)	teeth (noun)
the opening of a jar or bottle	the kind and number and arrangement of teeth (collectively) in a person or animal
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)

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