1) Barred 2) Debarred 3) Disallowed 4) Disqualified 5) English phrase 6) Excluded 7) Expelled 8) Forbade 9) Forbidden 10) Forbidden by law 11) Illegal 12) Interdicted 13) Legally prohibited 14) Like DDT 15) Like smoking on a plane 16) Not permitted 17) On the Index 18) Outlawed 19) Prevented 20) Prohibited Found on https://www.crosswordclues.com/clue/banned
banned (BAND) Prohibited, restricted, barred, excluded, banished, debarred, forbidden; proscribed, suppressed, interdicted: 'Bicycles are banned from the new superhighway.' 'They threatened to have the book banned.' Confusing Words: Units, Groups A to Z. Found on http://www.wordinfo.info/words/index/info/view_unit/3535/