Is Sula a scapegoat and is Ajax a scapegrace?

The dictionary definition for scapegoat is one that bears the blame for others. The same dictionary defines scapegrace as an incorrigible rascal. I learned that the word scapegrace exists because when I was looking up the word scapegoat, scapegrace is the word that falls below it. It is the very next definition after the word scapegoat in the dictionary. I know I am repeating myself but I find this to be very interesting and a little ironic and I feel it bears repeating.