| Word | Definitions | Synonyms |
|---|---|---|
| frost | (noun) weather cold enough to cause freezing | Synonyms: freeze |
| (noun) the formation of frost or ice on a surface | Synonyms: icing | |
| (noun) ice crystals forming a white deposit (especially on objects outside) | Synonyms: hoar, hoarfrost, rime | |
| hoarfrost | (noun) ice crystals forming a white deposit (especially on objects outside) | Synonyms: frost, hoar, rime |
| permafrost | (noun) ground that is permanently frozen | - |