piercing vs incisive

piercing and incisive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
piercing	No	Yes	No	No
incisive	No	Yes	No	No

As adjectives, piercing and incisive are synonyms defined as:

piercing and incisive: having or demonstrating ability to recognize or draw fine distinctions

Other synonyms of piercing include acute, discriminating, keen, knifelike, penetrating, penetrative, sharp.

piercing (adjective)	incisive (adjective)
having or demonstrating ability to recognize or draw fine distinctions	having or demonstrating ability to recognize or draw fine distinctions
painful as if caused by a sharp instrument	suitable for cutting or piercing