complex

complex adjective abstruse, bewildering, chaotic, circuitous, complicated, confused, convoluted, difficult, elaborated, enigmatic, entangled, flexuous, impenetrable, implicated, inextricable, inscrutable, interlaced, interwoven, intricate, involuted, involved, irreducible, kaleidoscopic, knotted, labyrinthine, mingled, muddled, multiplex, obscure, perplexing, recondite, sinuous, snarled, tangled, tortuous, unarranged, unclassified, unfathomable, unorganized, varied
Associated concepts: complex issues to be tried

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complex (Development), noun aggregate, association, collectivity, compages, composite, compound, conglomerate, conglomeration, group, network, organization, structure, system, totality, unity
Associated concepts: building complex, industrial complex, residential housing complex

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complex (Entanglement), noun clutter, complexus, confusion, convolution, derangement, difficulty, disarray, disorder, disorganization, enmeshment, imbroglio, intricacy, involution, involvement, jumble, labyrinth, maze, muddle, multiplex, snag, snarl, tangle, twist

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See also: abstruse, composite, compound, conglomerate, difficult, elaborate, inextricable, intricate, obscure, problematic, recondite, sinuous, sophisticated