Synonyms of no-no

1 Syllable
ban, dont, curst
2 Syllables
curse, banned, taboo, don't, barred, swearing, constraint, bani
3 Syllables
restrictions, pirated, restriction, forbidden, proscription, no-no's, outlawed, verboten, illicit, illegal, containment, closed-down, closed-up, restricted, malison, unlawful
4 Syllables
profanity, unapproved, prohibited, prohibition, malediction, prohibitions
5 Syllables
impermissible, unauthorized