Geothermal energy is the heat produced by the Earth's core and can be harnessed for a variety of uses. There are several synonyms for geothermally, which include thermal, heat-based, hot springs, and heated. To explain this further, geothermally refers to the heat produced by the Earth's core, while thermal refers to the scientific concept of heat. Heat-based refers to any technology, fuel, or energy that is based on the principle of heat. Hot springs refer to natural, hot, and mineral-rich springs that are formed by geothermal activity. Lastly, heated refers to anything that has been warmed by heat, including water, homes, or industrial processes that use geothermal energy.