Unreprovable is an adjective that describes something that cannot be criticized or faulted and is beyond reproach. It is a term that is often used in a moral or ethical context. Some synonyms for the word unreprovable include impeccable, faultless, irreproachable, blameless, and unimpeachable. These terms are used to describe someone or something that is perfect in every way and cannot be condemned or found wanting. Other synonyms include flawless, exemplary, virtuous, righteous, and noble. These words are often used to describe people who have high moral character or behave in an admirable manner. In summary, unreprovable synonyms share the same idea of being beyond reproach or criticism.