There are several synonyms for the word "un-guiltier" that can be used to convey the same meaning. Some of these words include innocent, blameless, faultless, pure, clean, virtuous, and righteous. These synonyms all relate to a situation where someone is not guilty or responsible for any wrongdoing, and they all express a sense of freedom from guilt or blame. Whether you choose to use "un-guiltier" or one of these synonyms in your writing, it is important to be clear in your communication and use precise language to convey your intended meaning.