Antonyms of noun nonequivalence

1 sense of nonequivalence

Sense 1
nonequivalence -- (not interchangeable)
       Antonym of equivalence (Sense 2)
      => equivalence -- (essential equality and interchangeability)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun nonequivalence

1 sense of nonequivalence

Sense 1
nonequivalence -- (not interchangeable)
       => inequality -- (lack of equality; "the growing inequality between rich and poor")