incisive vs piercing

incisive and piercing both are adjectives.

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

As adjectives, incisive and piercing are synonyms defined as:

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

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

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