narrow vs narrow-mouthed

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

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

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

narrow (adjective)	narrow-mouthed (adjective)
not wide	having a narrow mouth
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 (verb)	narrow-mouthed (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