Crossword solverSynonyms for igneous rock21 crossword answers for “igneous rock” (7,4), sorted by letter count.How many letters?All214151637284931031121211514 letters 1rock5 letters 1stone6 letters 3plutonaplitegabbro7 letters 2apliticdiorite8 letters 4porphyryandesiteandositerhyolite9 letters 3batholitebatholithpegmatite10 letters 3batholiticperidotitegroundmass11 letters 2batholithicporphyritic12 letters 1plutonic rock(8,4)15 letters 1porphyritic rock(11,4)