38 synonyms for complex such as fusion, composite, byzantine, combination, and composite. Complex is an adjective, and its antonyms are simple and straightforward.
Complex, composite, compound, compounded, and multiplex.
Byzantine, Daedalian, Gordian, complicated, convoluted, difficult, elaborate, fiddly, hard, impenetrable, intricate, involute, involuted, involved, knotty, labyrinthine, problematical, serpentine, tangled, thorny, tortuous, and tricky.
Aggregation, combination, composite, fusion, network, nexus, synthesis, system, tissue, and web.