What is another word for "cartel"?

Roget's Thesaurus (1911) lists these synonyms for "cartel": agent, agree, agreement, ahead, akimbo, and, arms, attest, bargain, barter, beard, beat, bid, big, bluster, bold, bond, brave, call, candle, caveat, challenge, charter, chest, clench, close, come, compact, complete, completion, compromise, conclude, concordat, confirm, contract, convention, conventional, courage, covenant, cry.