yarder has 1 distinct synonym spread across 1 of its 2 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.
(used only in combinations) the height or length of something in yards
“the golfer hit a 300-yarder to the green”
a winch (or system of winches) powered by an engine and used to haul logs from a stump to a landing or to a skid road
Synonyms, antonyms and the broader and narrower relations for yarder come from Princeton University’s WordNet. Full sources and licences.