Credibleness
Part of speech: noun
Definition: The state or quality of being credible.
Credibility
Part of speech: noun
Definition: reputation impacting one's ability to be believedWhether or not a witness is being truthful.
Example sentence: If you're a coach, and you don't have trust with players, you've got no chance, and your credibility is zero. And that's why it's so important to tell them the truth. If you have something that you're upset about, tell them the truth. If they're doing something wrong, tell them the truth.