| ferric(adjective, strong, hard, tough, sturdy) |
| ferrous(adjective, strong, hard, tough, sturdy) |
| firmly established(adjective, confirmed) |
| flat(adjective, severe, bleak, stark, austere) |
| glaring(adjective, severe, bleak, stark, austere) |
| grating(adjective, severe, bleak, stark, austere) |
| grinding |
| gruff(adjective, severe, sharp, nasty, bleak) |
| guttural(adjective, severe, bleak, stark, austere) |
| habituated(adjective, confirmed) |
| hairy(adjective, severe, sharp, nasty, bleak) |
| hard(adjective, strong, tough, severe, harsh) |
| hardboiled(adjective, sharp, nasty, disciplined, grooved) |
| hardened(adjective, confirmed) |
| haughty |
| heavy(adjective, strong, hard, tough, sturdy) |
| hoarse(adjective, severe, bleak, stark, austere) |
| immovable(adjective, strong, hard, tough, sturdy) |
| imperative |
| impetuous(impulsive, reckless) |