Barred spiral galaxies are a type of galaxy that is defined by a central bar structure in addition to spiral arms. These structures are critical in the formation and movement of stars and gas in the galaxy. If you're looking for synonyms for barred spiral galaxies, you may come across terms such as SB galaxy, barred galaxy, or lenticular galaxy. These terms are all used to describe barred spiral galaxies, depending on the specific characteristics of the galaxy in question. Regardless of the term used, these galaxies are characterized by their recognizable spiral arms and central bar structures and play an essential role in the study of astrophysics and cosmology.