WordNet records no synonym and no antonym for ore. 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 mineral that contains metal that is valuable enough to be mined
a monetary subunit in Denmark and Norway and Sweden; 100 ore equal 1 krona
Synonyms, antonyms and the broader and narrower relations for ore come from Princeton University’s WordNet. Full sources and licences.