narrow down vs narrow

narrow down is not a noun while narrow is a noun.

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

As verbs, narrow down and narrow are synonyms defined as:

narrow down and narrow: become more focused on an area of activity or field of study

Other synonyms of narrow down include specialise, specialize.

As verbs, narrow down and narrow are synonyms defined as:

Other synonyms of narrow down include nail down, peg down, pin down, specify.

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

narrow down (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

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