chip off vs flake

chip off is not a noun while flake is a noun.

Word	Noun	Adjective	Verb	Adverb
chip off	No	No	Yes	No
flake	Yes	No	Yes	No

As verbs, flake is a hyponym of chip off; that is, flake is a word with a more specific, narrower meaning than chip off:

Other hyponyms of chip off include flake off, peel, peel off, exfoliate.

chip off (noun)	flake (noun)
	a small fragment of something broken off from the whole
	a person with an unusual or odd personality
	a crystal of snow

chip off (verb)	flake (verb)
break off (a piece from a whole)	come off in flakes or thin small pieces
	cover with flakes or as if with flakes
	form into flakes