| foreboding(appearance, terrible, hopeless) |
| formidable(adjective, appearance, unpleasant, terrible, horrible) |
| foul(adjective, evil, mysterious, threatening, nefarious) |
| frightful(appearance, awful, terrible, hopeless, ominous) |
| frowny |
| funereal(appearance, terrible, hopeless) |
| ghastly(appearance, terrible, hopeless) |
| gnashing |
| grave(adjective, unpleasant, horrible, disagreeable, dreadful) |
| grievous(adjective, unpleasant, awful, terrible, horrible) |
| grisly(appearance, terrible, hopeless) |
| gruesome(appearance, terrible, hopeless) |
| heartbreaking |
| hellish(adjective, evil, mysterious, threatening, nefarious) |
| hidden(adjective, evil, mysterious, threatening, nefarious) |
| hideous(appearance, terrible, hopeless) |
| hopeless(appearance, terrible) |
| horrible(adjective, evil, unpleasant, awful, terrible) |
| horrid(appearance, awful, terrible, hopeless, ominous) |
| ignoble(adjective, unpleasant, horrible, disagreeable, dreadful) |