The word "guiltier" suggests an individual who is experiencing a sense of wrongdoing or culpability. Some synonyms for the word "guiltier" include blameworthy, accountable, responsible, at fault, remorseful, penitent, contrite, regretful, and ashamed. These words describe a person who acknowledges their mistake and feels the need to make amends. Additionally, the word "guiltier" can be paired with words that reflect the severity of the infraction such as more guilty, less guilty, or equally guilty. Overall, the synonyms for guiltier describe a person who is willing to take responsibility for their actions and address the consequences of their behavior.