What is another word for "union"?

Roget's Thesaurus (1911) lists these synonyms for "union": absorb, absorption, agent, agree, agreement, aid, alliance, alloy, along, amalgam, amalgamate, amalgamation, and, assent, attest, bargain, barter, blend, blending, bond, candle, cartel, cause, caveat, cement, centralization, centralize, charter, clench, close, coagency, coalesce, coalescence, coincide, coincidence, combination, combine, combined, come, common.