Igneous
Part of speech: adjective
Definition: Pertaining to, having the nature of fire; containing fire; resembling fire; as, an igneous appearance Resulting from, or produced by, the action of great heat; with rocks, it could also mean formed from lava/magma; as, granite and basalt are igneous rocks
Eruptive
Part of speech: noun
Definition: An eruptive rock
Part of speech: adjective
Definition: That eruptsThat is accompanied by eruptionsProduced by eruption