localisation has 8 distinct synonyms spread across 2 of its 2 senses. 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.
(physiology) the principle that specific functions have relatively circumscribed locations in some particular part or organ of the body
a determination of the place where something is
“he got a good fix on the target”
Synonyms, antonyms and the broader and narrower relations for localisation come from Princeton University’s WordNet. Full sources and licences.