"Nihil Obstat" is a Latin phrase that literally means "nothing stands in the way." It is commonly used in the Catholic Church as an official approval given to a book or other printed material, indicating that it does not contain any teachings contrary to the Catholic faith. There are several synonyms for "Nihil Obstat," such as "imprimatur," which means "let it be printed." Another synonym is "approbation," which means official approval or endorsement. Other possible synonyms include "sanction," "validation," and "accreditation," all of which denote a similar type of official approval of some form of written or printed material.