biometric identification has 2 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.
the automatic identification of living individuals by using their physiological and behavioral characteristics
“negative identification can only be accomplished through biometric identification”
Synonyms, antonyms and the broader and narrower relations for biometric identification come from Princeton University’s WordNet. Full sources and licences.