WordNet records no synonym and no antonym for congolese. 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 native or inhabitant of the Republic of the Congo
1 of the 2 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for congolese.
Synonyms, antonyms and the broader and narrower relations for congolese come from Princeton University’s WordNet. Full sources and licences.