| dead(adjective, killing) |
| death-dealing(adjective, deadly) |
| deciduous |
| desperate(adjective, awful, terrible, horrible, afraid) |
| deuced(adjective, awful, terrible, horrible, afraid) |
| direful(adjective, awful, terrible, horrible, afraid) |
| doggone(adjective, awful, terrible, horrible, afraid) |
| dread(adjective, awful, terrible, horrible, afraid) |
| dreaded(adjective, awful, terrible, horrible, afraid) |
| dull |
| earthborn |
| execrable(adjective, awful, terrible, horrible, afraid) |
| fearful(adjective, awful, terrible, horrible, afraid) |
| feral(adjective, mean, severe, harsh, cruel) |
| final(adjective, property) |
| flagitious(adjective, awful, terrible, horrible, afraid) |
| flagrant(adjective, awful, terrible, horrible, afraid) |
| flickering(adjective, transient) |
| fly-by-night |
| frightening(adjective, awful, terrible, horrible, afraid) |