In that light Noegel might want to consider Janus parallelism as an intersecting set with contranymy.
Source: wiktionary
Contranymy
//kənˈtɹɑn.ə.mi//
Synonyms for "contranymy" (2 found)
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Noun(1 words)
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Noun(1 words)
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There are cross-linguistic examples of words that allegedly mean x and the opposite of x; this phenomenon would be a facet of polysemy and is commonly referred to as auto-antonymy or contranymy.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.