chad has 5 distinct synonyms spread across 3 of its 4 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 small piece of paper that is supposed to be removed when a hole is punched in a card or paper tape
a landlocked desert republic in north-central Africa; was under French control until 1960
a family of Afroasiatic tonal languages (mostly two tones) spoken in the regions west and south of Lake Chad in north central Africa
Synonyms, antonyms and the broader and narrower relations for chad come from Princeton University’s WordNet. Full sources and licences.