Ordnances are weapons or ammunition used in war or by the military. Synonyms for the word "ordnances" include "arms," "munitions," "artillery," "weapons," "ammunition," and "armaments." These words refer to various types of physical equipment designed for use in combat, ranging from guns and tanks to missiles and bombs. Each of these synonyms has a slightly different connotation, and they can be used interchangeably in certain contexts. For example, "arms" might be used to refer to handheld weapons that soldiers use on the battlefield, while "artillery" might refer to larger, more powerful weapons like howitzers and cannons. Regardless of the context, these synonyms all refer to the tools of war and the destructive power they possess.