quid has 10 distinct synonyms spread across 3 of its 3 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.
the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence
something for something; that which a party receives (or is promised) in return for something he does or gives or promises
Synonyms, antonyms and the broader and narrower relations for quid come from Princeton University’s WordNet. Full sources and licences.