bat mitzvah has 2 distinct synonyms spread across 1 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.
(Judaism) an initiation ceremony marking the 12th birthday of a Jewish girl and signifying the beginning of religious responsibility
confirm in the bat mitzvah ceremony, of girls in the Jewish faith
Synonyms, antonyms and the broader and narrower relations for bat mitzvah come from Princeton University’s WordNet. Full sources and licences.