| frost(noun, property, chill, coldness, season) |
| hardened(adjective, hard, cool, tough, severe) |
| inanimate(adjective, hard, tough, severe, cruel) |
| inclement(adjective, cool, tough, severe, keen) |
| insensate(adjective, dull, hard, tough, severe) |
| insouciant(adjective, calm, cool, relaxed, indifferent) |
| intense(adjective, cool, complete, severe, keen) |
| low temperature(noun, expression, idiom, coolness) |
| nipping(adjective, cool, severe, keen, sharp) |
| numb(adjective, hard, tough, severe, cruel) |
| ominous(adjective, person, unwarmhearted) |
| rigid(adjective, hard, cool, severe, harsh) |
| ruthless(adjective, mean, hard, tough, severe) |
| shivery(adjective, cool, severe, keen, sharp) |
| sinister(adjective, person, unwarmhearted) |
| stonyhearted(adjective, person, informal, feelings, emotions) |
| tepid(adjective, calm, temper, negative, restrained) |
| unconscious(adjective, informal, indifferent, useful, fixed) |
| unloving(adjective, person, hard, cool, feelings) |
| unsocial(adjective, person, cool, indifferent, feelings) |