- igneous, pyrogenic, pyrogenous - produced under conditions involving intense heat; "igneous rock is rock formed by solidification from a molten state; especially from molten magma"; "igneous fusion is fusion by heat alone"; "pyrogenic strata"
- fiery, igneous - like or suggestive of fire; "the burning sand"; "a fiery desert wind"; "an igneous desert atmosphere"
Antonym: cold (indirect, via hot)