blot vs sully

blot is a noun but sully is not a noun.

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

As verbs, sully is a hyponym of blot; that is, sully is a word with a more specific, narrower meaning than blot:

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

Other hyponyms of blot include splotch, defile, maculate, stain, tarnish, bespeckle, speckle, bespatter, spatter.

blot (noun)	sully (noun)
an act that brings discredit to the person who does it
a blemish made by dirt

blot (verb)	sully (verb)
dry (ink) with blotting paper	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