WordNet records no synonym and no antonym for ureterocele. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
prolapse of the end of the ureter into the bladder; may obstruct urine flow
Synonyms, antonyms and the broader and narrower relations for ureterocele come from Princeton University’s WordNet. Full sources and licences.