List of unsanctioned synonyms and unsanctioned related words.
banned, barred, contraband, forbade, forbid, forbidden, illegal, illicit, nonpermissible, not permitted, off limits, out of bounds, outlawed, prohibited, ruled out, taboo, tabooed, unallowed, unauthorized, under the ban, unlawful, unlicensed, unpermissible, untouchable, verboten, vetoed