Synonyms for Tangled (same or very similar meaning)
WordNet sense 1 (highly complex or intricate):
byzantine, convoluted, involved, tortuousWordNet sense 2 (complicated in structure; consisting of interconnected parts):
complex, complexWordNet sense 3 (tangled in knots or snarls):
knotty, snarly, knotted, snarledFrom the ODE community, based on WordNetadd/edit