narrow vs peg down

narrow is a noun but peg down is not a noun.

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

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

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

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

narrow (adjective)	peg down (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 (verb)	peg down (verb)
make or become more narrow or restricted	define clearly
become tight or as if tight	fasten or secure with a wooden pin
become more focused on an area of activity or field of study
define clearly