mouth vs gum

mouth and gum both are nouns.

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

mouth (noun)	gum (noun)
the opening of a jar or bottle	the tissue (covered by mucous membrane) of the jaws that surrounds the bases of the teeth
the externally visible part of the oral cavity on the face and the system of organs surrounding the opening	a preparation (usually made of sweetened chicle) for chewing
the opening through which food is taken in and vocalizations emerge	any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum
an impudent or insolent rejoinder	wood or lumber from any of various gum trees especially the sweet gum
the point where a stream issues into a larger body of water	any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying
an opening that resembles a mouth (as of a cave or a gorge)	cement consisting of a sticky substance that is used as an adhesive
a person conceived as a consumer of food
a spokesperson (as a lawyer)

mouth (verb)	gum (verb)
express in speech	exude or form gum
articulate silently; form words with the lips only	become sticky
touch with the mouth	grind with the gums; chew without teeth and with great difficulty
	cover, fill, fix or smear with or as if with gum