| puzzling(adjective, hard, fancy, obscure, rough) |
| baffling(verb, adjective, hard, obscure, difficult) |
| enigmatic(adjective, hard, obscure, rough, difficult) |
| obscure(adjective, hard, rough, difficult, dark) |
| abstruse(adjective, hard, fancy, obscure, difficult) |
| difficult(adjective, hard, fancy, obscure, delicate) |
| incomprehensible(adjective, obscure, difficult, dark, strange) |
| cryptic(adjective, obscure, difficult, dark, strange) |
| unfathomable(adjective, hard, obscure, difficult, dark) |
| equivocal(adjective, obscure, rough, difficult, dark) |
| recondite(adjective, hard, fancy, obscure, difficult) |
| arcane(adjective, obscure, difficult, dark, strange) |
| strange(adjective, unfamiliar, bizarre, outlandish) |
| astonishing(adjective, bizarre, outlandish) |
| astounding(adjective, difficult, striking, bizarre) |
| dubious(strange, unclear, indistinct, indistinguishable) |
| funny(adjective, strange, bizarre, peculiar) |
| irregular(bizarre, outlandish) |
| bizarre(adjective, strange, outlandish) |
| concealed(adjective, obscure, difficult, dark, strange) |