What is another word for "fast"?

Roget's Thesaurus (1911) lists these synonyms for "fast": about, account, acquaintance, advocate, all, ally, alter, ambo, amigo, and, answer, answerable, arbitrary, arrear, associate, auxiliary, back, bad, bail, banyan, beau, bedfellow, best, bill, bird, blade, blood, blow, bond, boon, borrow, borrower, bosom, boutade, brain, buck, camel, capital, capriccio, caprice.