sully vs malign

sully is not an adjective while malign is an adjective.

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

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

sully: charge falsely or with malicious intent; attack the good name and reputation of someone
malign: speak unfavorably about

Other hyponyms of sully include assassinate, libel, badmouth, drag through the mud, traduce.

sully (adjective)	malign (adjective)
	evil or harmful in nature or influence
	having or exerting a malignant influence

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