The "dog star" is a term commonly used to refer to Sirius, which is the brightest star in the sky. However, there are other synonyms for the phrase "dog star" that can be used to refer to Sirius. Some of these synonyms include "Canicula," "Alpha Canis Majoris," "Sirius A," and "the Greater Dog Star." The term "Canicula" is derived from the Latin word for "little dog," which references Sirius's position in the constellation Canis Major. Some cultures also refer to Sirius as "Tiri," "Sopdet," or "Isis," depending on their respective mythological contexts. Regardless of what you choose to call it, the "dog star" is a fascinating object to observe in the night sky.