heritage has 1 distinct synonym spread across 3 of its 4 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.
practices that are handed down from the past by tradition
“a heritage of freedom”
any attribute or immaterial possession that is inherited from ancestors
“my only inheritance was my mother's blessing”
Synonyms, antonyms and the broader and narrower relations for heritage come from Princeton University’s WordNet. Full sources and licences.
that which is inherited; a title or property or estate that passes by law to the heir on the death of the owner
hereditary succession to a title or an office or property