Thermonuclear energy is the energy that is generated by the fusion of atomic cores at very high temperatures. There are several synonyms for thermonuclear energy including fusion energy, nuclear fusion, atomic fusion, and hydrogen fusion. All these terms refer to the same process of merging atomic nuclei to produce energy. Despite being a relatively new technology, thermonuclear energy has great potential to provide a source of clean and sustainable energy. Scientists and engineers are increasingly working to harness this energy source to reduce dependency on non-renewable energy sources. As fusion energy continues to evolve, researchers are confident that it will play a critical role in meeting the world's energy needs.