37 synonyms for combination such as coalition, alloy, alliance, and association. Combination is a noun, and its antonyms are separation and division.
Alloy, amalgam, amalgamation, blend, coalescence, coalition, composite, composition, compound, concoction, conjunction, fusing, fusion, incorporation, integration, marriage, mash-up, meld, merger, mingling, mix, mixture, pooling, synthesis, union, and weave.
Alliance, association, coalition, collaboration, concert, cooperation, league, partnership, synergy, and union.