Hydel refers to the use of water to generate electricity, and it is a common term in the energy sector. Nonetheless, there are several synonyms for hydel. One of them is hydroelectricity. Hydroelectricity is a type of energy that is produced by using water to turn turbines connected to generators. Another synonym is hydroenergy. Hydroenergy utilizes the motion of water to create electricity and includes various setups such as tidal power and wave energy. Additionally, hydropower is another synonym for hydel, which is a technology that harnesses the energy from flowing or falling water to create electricity. These synonyms are vital in describing the concept of water-based energy generation.