There are several synonyms for the term "horse soldiers," including cavalry, mounted troops, horsemen, and equestrians. These terms refer to military personnel who ride horses and use them as a means of transportation and combat. The cavalry has played a significant role in warfare throughout history, from ancient times to modern conflicts. Mounted troops and horsemen are also commonly used to describe soldiers who ride horses, while equestrians typically refer to riders who participate in non-military horseback activities such as showjumping and dressage. Overall, these synonyms showcase the important role that horses have played in military history and society as a whole.