Urethral diverticulum is a medical condition that occurs due to the weakening of the urethral wall muscles, causing the formation of a pouch within the urethra. There are several synonyms for this condition, including urethrocele, urethral cyst, and paraurethral cyst. Urethrocele is a term used to describe the protrusion or bulging of the urethral wall into the vaginal cavity, while urethral cyst or paraurethral cyst refers to the formation of a sac or pocket in the lining of the urethra. These terms are often used interchangeably in medical literature and can cause confusion, so it is essential to understand their meanings and differences correctly.