Water fever, also known as hydronephrosis, is a condition in which there is an accumulation of urine in the kidneys due to a blockage in the urinary tract. This can lead to swelling, discomfort, and infection. While "water fever" is a common term used to describe this condition, there are other synonyms that can also be used. These include kidney swelling, urinary tract obstruction, urinary retention, renal pelvic distension, and urinary tract distension. It is important to seek medical attention if you suspect you may have any of these symptoms or conditions as they can lead to serious health complications.