| grisly(adjective, description, attribute, feature, characteristic) |
| gruesome(adjective, description, attribute, feature, characteristic) |
| harrowing(adjective, description, attribute, feature, characteristic) |
| hideous(adjective, description, attribute, feature, characteristic) |
| horrendous(adjective, description, attribute, feature, characteristic) |
| hostile(adjective, tough, severe, harsh, cruel) |
| hours of darkness(noun, time, expression, state, situation) |
| impenetrable(adjective, feature, characteristic, obscure, description) |
| indefinite(adjective, dull, weak, rough, strange) |
| infamous(adjective, evil, mysterious, threatening, nefarious) |
| infernal(adjective, evil, mysterious, threatening, nefarious) |
| intricate(adjective, hard, evil, delicate, loose) |
| invisible(adjective, obscure, superior, mysterious, unknown) |
| lamentable(adjective, bad, sad, sorrow, depression) |
| lonesome(adjective, dull, gloomy, miserable, bleak) |
| merciless(adjective, feature, description, characteristics, attribute) |
| monstrous(adjective, description, feature, characteristic, attribute) |
| secrecy(noun, confidence, silence, ignorance, concealment) |
| shadiness(noun, time, state, shade, situation) |
| shadowiness(noun, time, state, shade, situation) |