Purehearted is a term that describes someone who is genuine and sincere in their intentions. Other synonyms for this word include honest, innocent, virtuous, and sincere. Each of these words carries a slightly different connotation, but they all indicate that the individual has a pure and truthful heart. Honorable, noble, and righteous are also appropriate synonyms. These words all indicate that the person is guided by a strong moral compass and has a true desire to do good. Trustworthy and dependable are synonyms that focus more on the reliability of the individual. Overall, all of these synonyms describe the same admirable trait of having an untainted and pure heart.