narrowed vs narrow

narrowed is not a noun while narrow is a noun.

Word	Noun	Adjective	Verb	Adverb
narrowed	No	Yes	No	No
narrow	Yes	Yes	Yes	No

narrowed (noun)	narrow (noun)
	a narrow strait connecting two bodies of water

narrowed (adjective)	narrow (adjective)
made narrow; limited in breadth	not wide
reduced in size as by squeezing together	very limited in degree
	lacking tolerance or flexibility or breadth of view
	characterized by painstaking care and detailed examination
	limited in extent or scope

narrowed (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