Bond energy is the amount of energy required to break a chemical bond. There are a few synonyms for bond energy which are commonly used in chemical literature. These include bond enthalpy, bond dissociation energy, and bond strength. Bond enthalpy and bond dissociation energy are essentially the same thing and are defined as the amount of energy needed to break a particular bond in a specific molecule. Bond strength, on the other hand, is a more general term that refers to the overall strength of a bond in a molecule. Overall, whether you are using bond energy, bond enthalpy, bond dissociation energy, or bond strength, the concept remains the same - it is the energy required to break a chemical bond in a molecule.