Hematocele refers to the accumulation of blood in a body cavity due to some injury or damage to the blood vessels. However, there are several synonyms that could be used to depict this condition. Some of the common synonyms for hematocele include hematoma, blood cyst, blood clot, and blood tumor. These synonyms are often used interchangeably, but they all refer to a fluid-filled cyst that contains blood and other substances. Other less known synonyms for hematocele include blood blister, blood sac, and blood swelling. Regardless of the synonym used, diagnosis and treatment for hematocele should always be done by a medical professional since it can indicate serious underlying health issues.