WordNet records no synonym and no antonym for oriya. 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.
a member of a people in India living in Orissa and neighboring areas
a Magadhan language that is spoken by the Oriya and is the official language of the Indian state of Orissa
Synonyms, antonyms and the broader and narrower relations for oriya come from Princeton University’s WordNet. Full sources and licences.