There are various synonyms that can be used instead of "strong interaction", which is a term frequently used in physics. Some of the synonyms that can be used instead include "strong force", "strong nuclear force", and "strong coupling". Strong interaction refers to the powerful force that binds atomic nuclei and subatomic particles. It is responsible for holding protons and neutrons together in the nucleus of an atom. The strong force is essential for understanding various interactions that occur in nuclear physics. Using synonyms can help in avoiding repetitions in written or verbal communication. Hence, it is essential to know and use synonyms appropriately.