Synonyms for taboo

sacred, forbidden, out of bounds, reserved; see holy 1, illegal, restricted.

restriction, reservation, stricture, limitation, law, regulation, superstition, prohibition, proscription, ban, no-no*, interdiction, social convention, moral obligation, religious convention; see also sanction 2.

inhibit, interdict, prohibit, proscribe, forbid, prevent, debar, disallow, exclude, circumscribe, hinder, ban, frown upon, restrict, veto; see also hinder, restrain 1.

Antonyms allow, permit, sanction.