narrowing vs tapering

narrowing and tapering both are nouns.

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

As adjectives, narrowing and tapering are synonyms defined as:

Other synonyms of narrowing include tapered.

narrowing (noun)	tapering (noun)
the act of making something narrower	the act of gradually lowering the size or amount
an instance of becoming narrow
a decrease in width

narrowing (adjective)	tapering (adjective)
(of circumstances) tending to constrict freedom	gradually decreasing until little remains
becoming gradually narrower	becoming gradually narrower