Can gangrene have any nicknames or aliases?

Some. Gangrene is a dusky to black tissue appearance due to necrosis (tissue death). The causes are many and the names revolve around those causes such as "wet" (gooey infected looking), "dry" (black mummified like frost bite, "gas", bubbly/gassy due to gas producing infection. Some times the location is inferred such as fournier's gangrene of the groin/perineum from urinary or rectal infection, etc.