wilderness has 1 distinct synonym spread across 1 of its 4 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.
(politics) a state of disfavor
“he led the Democratic party back from the wilderness”
a wooded region in northeastern Virginia near Spotsylvania where bloody but inconclusive battles were fought in the American Civil War
a wild and uninhabited area left in its natural condition
Synonyms, antonyms and the broader and narrower relations for wilderness come from Princeton University’s WordNet. Full sources and licences.
“it was a wilderness preserved for the hawks and mountaineers”
a bewildering profusion
“the duties of citizenship are lost sight of in the wilderness of interests of individuals and groups”