The term "double dealers" implies deceit, treachery and falsehood. Antonyms for this phrase would be those that represent honesty, loyalty and reliability. Examples of such antonyms include trustworthy, truthful, sincere, dependable, loyal, genuine, dedicated and faithful. These terms are used to describe people who are honest, trustworthy and committed to their principles, values and beliefs. Individuals who exhibit these qualities are highly respected and valued in both personal and professional relationships. Antonyms for "double dealers" represent the opposite of deceitful behavior and are essential traits for building strong and healthy relationships.