scrap vs scurf

scrap and scurf both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrap	Yes	No	Yes	No
scurf	Yes	No	No	No

As nouns, scurf is a hyponym of scrap; that is, scurf is a word with a more specific, narrower meaning than scrap:

Other hyponyms of scrap include matchwood, exfoliation, scale, sliver, splinter.

scrap (noun)	scurf (noun)
the act of fighting; any contest or struggle	(botany) a covering that resembles scales or bran that covers some plant parts
a small piece of something that is left over after the rest has been used	a thin flake of dead epidermis shed from the surface of the skin
a small fragment of something broken off from the whole
worthless material that is to be disposed of

scrap (verb)	scurf (verb)
make into scrap or refuse
have a disagreement over something
dispose of (something useless or old)