General synonyms:
* Honesty: This is the most common and direct synonym for truthfulness.
* Veracity: This word emphasizes the accuracy and reliability of the truth being spoken.
* Integrity: This word implies a strong moral compass and adherence to truthfulness as a principle.
* Frankness: This word suggests honesty that is open and direct, without being afraid to speak the truth.
* Candor: Similar to frankness, this word implies honesty that is sincere and straightforward.
More specific synonyms:
* Authenticity: This word suggests that the truth is genuine and not fabricated.
* Transparency: This word emphasizes the openness and lack of hidden agendas in communication.
* Reliability: This word suggests that the person is consistently truthful and trustworthy.
* Credibility: This word implies that the person is believable and their truthfulness is accepted by others.
The best word to use will depend on the specific situation and the desired effect.