future has 6 distinct synonyms spread across 3 of its 7 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. Its 2 recorded opposites are past, present.
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 time yet to come
bulk commodities bought or sold at an agreed price for delivery at a specified future date
2 of the 7 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for future.
Synonyms, antonyms and the broader and narrower relations for future come from Princeton University’s WordNet. Full sources and licences.