knifelike vs penetrative

knifelike and penetrative both are adjectives.

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

As adjectives, knifelike and penetrative are synonyms defined as:

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

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

knifelike (adjective)	penetrative (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	tending to penetrate; having the power of entering or piercing
cutting or able to cut as if with a knife
painful as if caused by a sharp instrument