WordNet records no synonym and no antonym for cumbria. 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.
a former Celtic kingdom in northwestern England; the name continued to be used for the hilly northwestern region of England including the Lake District and the northern Pennines
Synonyms, antonyms and the broader and narrower relations for cumbria come from Princeton University’s WordNet. Full sources and licences.