Thermal Energy is the total energy of motion in the particles of a substance.
Thermal Energy is also a word we use to describe something in the category of heat etc.
Another thing we can talk about is Radiation and it means the transfer of heat through electromagnetic waves, in other words it means when you touch something which object is the warmer that will be the object giving off heat.
Another thing to talk about is Convection it transfer of heat by movement by fluids such as water and air
The last thing we can talk about is Conduction, Conduction is the transfer of heat from one object to another in other words if a warmer object is touching a colder object the warmer object is gonna give off heat to the cooler one.