The condition of being malicious; malevolence or malice(noun)
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Use "maliciousness" in a sentence
""I think everyone would agree it was reckless, but it did not rise to the level of maliciousness, which is the intent to cause harm," Reed said."
""If you acted with maliciousness, that is to be determined by trial," Nolan told Call."
"When people came to know, they said that to have done it when sober had shown him possessed of a kind of maliciousness and cynicism almost pardonable, but to do it when tipsy proved him merely weak and foolish."