track has 32 distinct synonyms spread across 11 of its 16 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 line or route along which something travels or moves
“the hurricane demolished houses in its path”
a pair of parallel rails providing a runway for wheels
an endless metal belt on which tracked vehicles move over the ground
(computer science) one of the circular magnetic paths on a magnetic disk that serve as a guide for writing and reading data
a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll
any road or path affording passage especially a rough one
the act of participating in an athletic competition involving running on a track
carry on the feet and deposit
“track mud into the house”
observe or plot the moving path of something
“track a missile”
travel across or pass over
“The caravan covered almost 100 miles each day”
Synonyms, antonyms and the broader and narrower relations for track come from Princeton University’s WordNet. Full sources and licences.