date has 8 distinct synonyms spread across 5 of its 12 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 participant in a date
“his date never stopped talking”
a meeting arranged in advance
“she asked how to avoid kissing at the end of a date”
the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred
“he tried to memorizes all the dates for his history class”
a particular day specified as the time something happens
“the date of the election is set by law”
sweet edible fruit of the date palm with a single long woody seed
go on a date with
“Tonight she is dating a former high school sweetheart”
Synonyms, antonyms and the broader and narrower relations for date come from Princeton University’s WordNet. Full sources and licences.
assign a date to; determine the (probable) date of
“Scientists often cannot date precisely archeological or prehistorical findings”