WordNet records no synonym and no antonym for prakrit. It is the only member of each of its synsets, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
any of the vernacular Indic languages of north and central India (as distinguished from Sanskrit) recorded from the 3rd century BC to the 4th century AD
Synonyms, antonyms and the broader and narrower relations for prakrit come from Princeton University’s WordNet. Full sources and licences.