What is another word for "convention"?

Roget's Thesaurus (1911) lists these synonyms for "convention": agent, agree, agreement, and, attest, bargain, barter, bond, candle, cartel, caveat, charter, clench, close, come, compact, complete, completion, compromise, conclude, concordat, confirm, contract, conventional, covenant, deal, diplomacy, endorse, engage, favored, for, free, hand, inch, indent, indenture, indorse, make, mediation, most.