sully vs fleck

sully is not a noun while fleck is a noun.

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

As verbs, fleck is a hypernym of sully; that is, fleck is a word with a broader meaning than sully:

sully: make dirty or spotty, as by exposure to air; also used metaphorically
fleck: make a spot or mark onto

Other hypernyms of sully include blob, blot, spot.

sully (noun)	fleck (noun)
	a small contrasting part of something
	a small fragment of something broken off from the whole

sully (verb)	fleck (verb)
charge falsely or with malicious intent; attack the good name and reputation of someone	make a spot or mark onto
make dirty or spotty, as by exposure to air; also used metaphorically
place under suspicion or cast doubt upon