WordNet records no synonym and no antonym for photius. It is the only member of its synset, 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.
Patriarch of Constantinople and saint of the Greek Orthodox Church; was condemned by the Fourth Council of Constantinople in 869 but was reinstated by a later pope
Synonyms, antonyms and the broader and narrower relations for photius come from Princeton University’s WordNet. Full sources and licences.