| intricate(adjective, hard, simple, difficult, delicate) |
| complicated(verb, adjective, hard, simple, difficult) |
| complex(adjective, hard, simple, bright, difficult) |
| elaborate(adjective, hard, simple, difficult, complex) |
| knotty(adjective, hard, simple, difficult, delicate) |
| labyrinthine(adjective, hard, simple, difficult, complex) |
| Byzantine(adjective, hard, simple, difficult, complex) |
| difficult(adjective, hard, delicate, complex, awkward) |
| daedal(adjective, hard, simple, difficult, complex) |
| perplexed(verb, adjective, hard, difficult, complex) |
| hard(adjective, difficult, complex, awkward, demanding) |
| knotted(adjective, hard, difficult, complex, complicated) |
| sophisticated(adjective, hard, difficult, complex, dense) |
| thorny(adjective, hard, difficult, delicate, complex) |
| Gordian(adjective, hard, difficult, complex, dense) |
| compound(adjective, hard, difficult, complex) |
| profound(adjective, hard, difficult, complex) |
| tricky(adjective, hard, difficult, delicate, complex) |
| inextricable(adjective, hard, difficult, complex, complicated) |
| problematic(adjective, hard, difficult, delicate, complex) |