What is another word for "firm"?

Roget's Thesaurus (1911) lists these synonyms for "firm": account, accountable, accountant, acquit, actuary, adamant, adamantean, adamantine, agent, and, arithmetic, assets, audit, auditor, back, balance, banker, bean, bear, bill, bird, block, board, bond, bone, bony, book, bookkeeper, bookkeeping, brick, bring, broker, buckram, budget, bull, buyer, cadger, calculous, callosity, cambist.