flake vs scurf

flake and scurf both are nouns.

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

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

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

flake (noun)	scurf (noun)
a small fragment of something broken off from the whole	(botany) a covering that resembles scales or bran that covers some plant parts
a person with an unusual or odd personality	a thin flake of dead epidermis shed from the surface of the skin
a crystal of snow

flake (verb)	scurf (verb)
come off in flakes or thin small pieces
cover with flakes or as if with flakes
form into flakes