WordNet sense 1 (United States painter (born in England) of portraits and historical scenes (1783-1872)):

Thomas Sully

WordNet sense 2 (French statesman (1560-1641)):

Duc de Sully, Maxmilien de Bethune

WordNet sense 3 (place under suspicion or cast doubt upon):

cloud, corrupt, defile, taint, defile

WordNet sense 4 (make dirty or spotty, as by exposure to air; also used metaphorically):

stain, tarnish, maculate

WordNet sense 5 (charge falsely or with malicious intent; attack the good name and reputation of someone):

besmirch, calumniate, defame, denigrate, slander, smear, smirch, asperse