Another word for banish
To condemn to exile
exile, expatriate, deport, transport, ostracize, excommunicate, proscribe, drive out, cast out, outlaw, extradite, sequester, isolate, relegate, expel, oust, dismiss, send to Coventry*, put a price on*.
To remove completely
banish implies removal from a country (not necessarily one's own) as a formal punishment; exile implies compulsion to leave one's own country, either because of a formal decree or through force of circumstance; expatriate suggests more strongly voluntary exile and often implies the acquiring of citizenship in another country; to deport is to send (an alien) out of the country, because the alien either entered unlawfully or is regarded as undesirable; to transport, in this connection, is to banish (a convict) to a penal colony; ostracize, which historically referred to temporary banishment of a citizen in ancient Greece by popular vote, today implies forced exclusion from society or a certain group by general consent ostracized for scandalous behavior