speck vs fleck

speck and fleck both are nouns.

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

As nouns, fleck is a hypernym of speck; that is, fleck is a word with a broader meaning than speck:

Other hypernyms of speck include dapple, maculation, patch, speckle, spot.

speck (noun)	fleck (noun)
a very small spot	a small contrasting part of something
a slight but appreciable amount	a small fragment of something broken off from the whole
(nontechnical usage) a tiny piece of anything

speck (verb)	fleck (verb)
produce specks in or on	make a spot or mark onto