flake vs nut case

flake and nut case both are nouns.

Word	Noun	Adjective	Verb	Adverb
flake	Yes	No	Yes	No
nut case	Yes	No	No	No

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

Other hyponyms of flake include crackpot, crank, fruitcake, nut, screwball, nutter, wacko, whacko.

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

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