constrictive vs narrowing

constrictive is not a noun while narrowing is a noun.

Word	Noun	Adjective	Verb	Adverb
constrictive	No	Yes	No	No
narrowing	Yes	Yes	No	No

As adjectives, constrictive and narrowing are synonyms defined as:

constrictive and narrowing: (of circumstances) tending to constrict freedom

Other synonyms of constrictive include constricting.

constrictive (noun)	narrowing (noun)
	the act of making something narrower
	an instance of becoming narrow
	a decrease in width

constrictive (adjective)	narrowing (adjective)
(of circumstances) tending to constrict freedom	(of circumstances) tending to constrict freedom
restricting the scope or freedom of action	becoming gradually narrower