narrow-mouthed vs narrow

narrow-mouthed is not a noun while narrow is a noun.

Word	Noun	Adjective	Verb	Adverb
narrow-mouthed	No	Yes	No	No
narrow	Yes	Yes	Yes	No

narrow-mouthed (noun)	narrow (noun)
	a narrow strait connecting two bodies of water

narrow-mouthed (adjective)	narrow (adjective)
having a narrow mouth	not wide
	very limited in degree
	lacking tolerance or flexibility or breadth of view
	characterized by painstaking care and detailed examination
	limited in extent or scope

narrow-mouthed (verb)	narrow (verb)
	make or become more narrow or restricted
	become tight or as if tight
	become more focused on an area of activity or field of study
	define clearly