widen vs narrow

widen is not a noun while narrow is a noun.

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

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

widen (adjective)	narrow (adjective)
	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

widen (verb)	narrow (verb)
become broader or wider or more extensive	make or become more narrow or restricted
extend in scope or range or area	become tight or as if tight
make wider	become more focused on an area of activity or field of study
make (clothes) larger	define clearly