There are various synonyms for the phrase "are evil". One of the most commonly used synonyms is "are wicked", which can describe someone or something that is morally corrupt or sinful. Another synonym is "are malevolent", which suggests that the person or thing is intentionally harmful or cruel. "Are malignant" is another synonym that denotes a malicious or dangerous quality. "Are nefarious" suggests that the person or thing is involved in sinister or illegal activities. Meanwhile, "are depraved" suggests that the person or thing is morally corrupt and has lost all sense of decency. These synonyms help to convey a negative connotation towards a person or thing that is considered evil.