Crossword clues for the word: GEOTHERMAL The word GEOTHERMAL has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for GEOTHERMAL Showing 1 to 4 of 4 results Clue(s) Home heating and cooling option Kind of power common in Iceland Like the energy generated by harnessing the heat of the earth's interior Pertaining to the internal heat of the earth