razorblade vs blade

razorblade and blade both are nouns.

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

As nouns, blade is a hypernym of razorblade; that is, blade is a word with a broader meaning than razorblade:

razorblade (noun)	blade (noun)
a blade that has very sharp edge	the flat part of a tool or weapon that (usually) has a cutting edge
	a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
	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