driver has 2 distinct synonyms spread across 2 of its 5 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 one recorded opposite is nondriver.
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 operator of a motor vehicle
a golfer who hits the golf ball with a driver
(computer science) a program that determines how a computer will communicate with a peripheral device
a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee
Synonyms, antonyms and the broader and narrower relations for driver come from Princeton University’s WordNet. Full sources and licences.