trace has 18 distinct synonyms spread across 9 of its 14 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.
discover traces of
“She traced the circumstances of her birth”
make one's course or travel along a path; travel or pass over, around, or along
“The children traced along the edge of the dark forest”
copy by following the lines of the original drawing on a transparent sheet placed upon it; make a tracing of
“trace a design”
a just detectable amount
“he speaks French with a trace of an accent”
an indication that something has been present
“there wasn't a trace of evidence for the claim”
Synonyms, antonyms and the broader and narrower relations for trace come from Princeton University’s WordNet. Full sources and licences.
either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree
a visible mark (as a footprint) left by the passage of person or animal or vehicle