Scurrilousness refers to the use of vulgar or abusive language to attack or malign someone. However, there are several synonyms for this word that can be used in its place depending on the context. For instance, the word 'defamation' can be used to imply injury to one's reputation or character. 'Calumny' is another synonym, and it is also employed when someone makes false and defamatory statements about another person. The word 'slur' is used similarly when someone denigrates another person based on their race, gender, or religion. Other synonyms include 'smear,' 'vilification,' and 'slander.' All of these synonyms imply malicious intent and can be used interchangeably to describe the same behavior.