Geothermal power is a renewable energy source that harnesses the heat stored beneath the Earth's surface to generate electricity. There are several synonyms for this term, including geothermal energy, geothermal heat, and geothermal electricity. Other commonly used synonyms include earth heat, geo-thermal power, and ground-source heat pumps. These terms all refer to the same essential concept of using the Earth's natural heat to produce energy. The popularity of geothermal power is growing as people recognize the need for clean, sustainable energy sources. With new advances in technology, geothermal power is expected to become an even more valuable and reliable source of energy in the future.