leucotomy has 6 distinct synonyms spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes
Synonyms, antonyms and the broader and narrower relations for leucotomy come from Princeton University’s WordNet. Full sources and licences.