pahlavi has 5 distinct synonyms spread across 2 of its 3 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.
Shah of Iran who was deposed in 1979 by Islamic fundamentalists (1919-1980)
the Iranian language of the Zoroastrian literature of the 3rd to 10th centuries
Synonyms, antonyms and the broader and narrower relations for pahlavi come from Princeton University’s WordNet. Full sources and licences.
the script (derived from the Aramaic alphabet) used to write the Pahlavi language