flake vs wacko

flake and wacko both are nouns.

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

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

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

flake (noun)	wacko (noun)
a small fragment of something broken off from the whole	a person who is regarded as eccentric or mad
a person with an unusual or odd personality
a crystal of snow

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