There are a variety of synonyms for the term "blues song," each carrying its own unique connotations and history. One popular term is "12-bar blues," referring to the common chord progression found in many traditional blues songs. Another term is "delta blues," referring specifically to the style of blues music that emerged from the Mississippi Delta region in the early 20th century. "Chicago blues" is another commonly used synonym, describing the electric blues style that emerged in the Windy City during the 1940s and 50s. Other synonyms might include "country blues," "rhythm and blues," or simply "blues music." Regardless of the terminology used, the blues remains a powerful and enduring musical genre that continues to inspire artists around the world.