knife vs blade

knife and blade both are nouns.

Word	Noun	Adjective	Verb	Adverb
knife	Yes	No	Yes	No
blade	Yes	No	No	No

knife (noun)	blade (noun)
edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle	the flat part of a tool or weapon that (usually) has a cutting edge
a weapon with a handle and blade with a sharp point	a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
any long thin projection that is transient	flat surface that rotates and pushes against air or water
	the part of the skate that slides on the ice
	a broad flat body part (as of the shoulder or tongue)
	a cut of beef from the shoulder blade
	something long and thin resembling a blade of grass
	a dashing young man
	especially a leaf of grass or the broad portion of a leaf as distinct from the petiole

knife (verb)	blade (verb)
use a knife on