Antonyms of noun mutability

1 sense of mutability

Sense 1
mutability, mutableness -- (the quality of being capable of mutation)
       Antonym of immutability (Sense 1)
      => immutability, immutableness, fixity -- (the quality of being incapable of mutation; "Darwin challenged the fixity of species")

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

1 sense of mutability

Sense 1
mutability, mutableness -- (the quality of being capable of mutation)
       => changeableness, changeability -- (the quality of being changeable; having a marked tendency to change; "the changeableness of the weather")