wildness has 7 distinct synonyms spread across 2 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. Its one recorded opposite is tameness.
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.
Synonyms, antonyms and the broader and narrower relations for wildness come from Princeton University’s WordNet. Full sources and licences.
an unruly disposition to do as one pleases
“Liza had always had a tendency to wildness”
an intractably barbarous or uncultivated state of nature