Synonyms for the word "ingenuously" include candidly, sincerely, artlessly, openly, plainly, honestly, straightforwardly, naively, innocently, and forthrightly. These synonyms all convey an honesty and simplicity in communication. "Candidly" and "sincerely" emphasize an open and truthful expression of thoughts and feelings. "Artlessly" and "naively" suggest a lack of artifice or cunning in one's behavior. "Innocently" connotes a pure, unaffected quality, while "forthrightly" implies a directness and honesty. All of these synonyms are useful for expressing an open and honest attitude, whether it be in personal relationships or in professional settings.