/ Thesaurus / N Synonyms of nihil obstat Find synonyms for: Noun1. nihil obstat, sanction, countenance, endorsement, indorsement, warrant, imprimaturusage: the phrase used by the official censor of the Roman Catholic Church to say that a publication has been examined and contains nothing offensive to the church2. nihil obstat, sanctionusage: authoritative approvalWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language