The synonyms for "complicated" include a range of words conveying difficulty, complexity, and intricacy. Some strong synonyms are:
- arduous
- convoluted
- difficult
- intricate
- knotty
- perplexing
- problematic
- sophisticated
- troublesome
Other common synonyms include complex, involved, elaborate, detailed, confusing, tricky, tangled, and demanding. These words express the various nuances of something being not simple, having many interconnected parts, or being hard to understand or deal with.