wood has 10 distinct synonyms spread across 6 of its 8 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.
the trees and other plants in a large densely wooded area
English writer of novels about murders and thefts and forgeries (1814-1887)
United States painter noted for works based on life in the Midwest (1892-1942)
any wind instrument other than the brass instruments
a golf club with a long shaft used to hit long shots; originally made with a wooden head
“metal woods are now standard”
Synonyms, antonyms and the broader and narrower relations for wood come from Princeton University’s WordNet. Full sources and licences.