WordNet records no synonym and no antonym for shadow cabinet. 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.
a group of senior members of the political party that is out of power; these members would probably assume corresponding positions as ministers in the British Cabinet if their party was elected
Synonyms, antonyms and the broader and narrower relations for shadow cabinet come from Princeton University’s WordNet. Full sources and licences.