discriminating vs piercing

discriminating and piercing both are adjectives.

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

As adjectives, discriminating and piercing are synonyms defined as:

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

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

discriminating (adjective)	piercing (adjective)
showing or indicating careful judgment and discernment especially in matters of taste	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