Synonyms for Prohibited (same or very similar meaning)
WordNet sense 1 (excluded from use or mention):
forbidden, out, taboo, verboten, proscribed, tabuWordNet sense 2 (not permitted):
impermissibleWordNet sense 3 (forbidden by law):
bannedWordNet sense 4 (prohibited by law or by official or accepted rules):
illegalFrom the ODE community, based on WordNetadd/edit