quotation has 7 distinct synonyms spread across 2 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 short note recognizing a source of information or of a quoted passage
“the student's essay failed to list several important citations”
a statement of the current market price of a security or commodity
the practice of quoting from books or plays etc.
“since he lacks originality he must rely on quotation”
Synonyms, antonyms and the broader and narrower relations for quotation come from Princeton University’s WordNet. Full sources and licences.