WordNet records no synonym and no antonym for eniwetok. 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.
an atoll in the Marshall Islands; site of an amphibious assault in World War II; later used temporarily by the United States to test atomic bombs
World War II (February 1944); American infantry landed and captured a Japanese stronghold
Synonyms, antonyms and the broader and narrower relations for eniwetok come from Princeton University’s WordNet. Full sources and licences.