knifelike vs piercing

knifelike and piercing both are adjectives.

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

As adjectives, knifelike and piercing are synonyms defined as:

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

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

As adjectives, knifelike and piercing are synonyms defined as:

Other synonyms of knifelike include cutting, keen, lancinate, lancinating, stabbing.

knifelike (adjective)	piercing (adjective)
having a sharp or distinct edge	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
cutting or able to cut as if with a knife
painful as if caused by a sharp instrument