Not guilty is a phrase that is often used in legal proceedings to indicate that an individual has been acquitted of a crime. There are several synonyms for this phrase that convey a similar meaning, such as innocent, cleared, exonerated, vindicated, and acquitted. All of these synonyms emphasize the absence of guilt and the lack of responsibility for a particular offense. While each of these words has nuanced differences in meaning, they can all be used as substitutes for "not guilty" in legal contexts. It's important to note that not guilty only refers to a legal verdict, whereas innocent and other synonyms can refer to a broader sense of moral or ethical purity.