cd has 10 distinct synonyms spread across 5 of its 5 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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 soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin
a debt instrument issued by a bank; usually pays interest
a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser
being one hundred more than three hundred
Synonyms, antonyms and the broader and narrower relations for cd come from Princeton University’s WordNet. Full sources and licences.