1. (noun) puzzling complexity

• complication
• knottiness
• tortuousness

1. (noun) puzzling complexity

• complexity
• complexness

1. (noun) puzzling complexity

• baffling
• elusive
• knotty
• problematic
• problematical
• tough
• byzantine
• byzantine
• convoluted
• convoluted
• involved
• involved
• knotty
• knotty
• tangled
• tangled
• tortuous
• tortuous
• complicate
• elaborate
• rarify
• refine
• complicated
• tortuous