WordNet records no synonym and no antonym for tutankhamen. 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.
Pharaoh of Egypt around 1358 BC; his tomb was discovered almost intact by Howard Carter in 1922
Synonyms, antonyms and the broader and narrower relations for tutankhamen come from Princeton University’s WordNet. Full sources and licences.