WordNet records no synonym and no antonym for dividend. 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.
that part of the earnings of a corporation that is distributed to its shareholders; usually paid quarterly
a bonus; something extra (especially a share of a surplus)
Synonyms, antonyms and the broader and narrower relations for dividend come from Princeton University’s WordNet. Full sources and licences.