| Word | Definitions | Synonyms |
|---|---|---|
| igneous | (adjective) produced by the action of fire or intense heat | Synonyms: eruptive |
| (adjective) produced under conditions involving intense heat | Synonyms: pyrogenic, pyrogenous | |
| (adjective) like or suggestive of fire | Synonyms: fiery | |
| ignescent | (adjective) can emit sparks or burst into flame | - |