mouth vs say

mouth and say both are nouns.

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

mouth (noun)	say (noun)
the opening of a jar or bottle	the chance to speak
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)	say (verb)
express in speech	express in words
articulate silently; form words with the lips only	report or maintain
touch with the mouth	speak, pronounce, or utter in a certain way
	express a supposition
	give instructions to or direct somebody to do something with authority
	communicate or express nonverbally
	recite or repeat a fixed text
	indicate
	state as one's opinion or judgement; declare
	utter aloud
	have or contain a certain wording or form