fleck vs sliver

fleck and sliver both are nouns.

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

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

Other hyponyms of fleck include matchwood, exfoliation, scale, scurf, scurf, splinter.

fleck (noun)	sliver (noun)
a small contrasting part of something	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

fleck (verb)	sliver (verb)
make a spot or mark onto	break up into splinters or slivers
	form into slivers
	divide into slivers or splinters