WordNet records no synonym and no antonym for berlin airlift. 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.
airlift in 1948 that supplied food and fuel to citizens of west Berlin when the Russians closed off land access to Berlin
Synonyms, antonyms and the broader and narrower relations for berlin airlift come from Princeton University’s WordNet. Full sources and licences.