sliver vs flake

sliver and flake both are nouns.

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

As nouns, flake is a hypernym of sliver; that is, flake is a word with a broader meaning than sliver:

Other hypernyms of sliver include bit, chip, fleck, scrap.

sliver (noun)	flake (noun)
a thin fragment or slice (especially of wood) that has been shaved from something	a small fragment of something broken off from the whole
a small thin sharp bit of wood or glass or metal	a person with an unusual or odd personality
	a crystal of snow

sliver (verb)	flake (verb)
break up into splinters or slivers	come off in flakes or thin small pieces
form into slivers	cover with flakes or as if with flakes
divide into slivers or splinters	form into flakes