WordNet records no synonym and no antonym for damon and pythias. 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.
(Greek mythology) according to a Greek legend: when Pythias was sentenced to be executed Damon took his place to allow Pythias to get his affairs in order; when Pythias returned in time to save Damon the king was so impressed that he let them both live
Synonyms, antonyms and the broader and narrower relations for damon and pythias come from Princeton University’s WordNet. Full sources and licences.