Antonyms of noun unalterability

1 of 2 senses of unalterability

Sense 1
unalterability -- (the quality of not being alterable)
       Antonym of alterability (Sense 1)
      => alterability -- (the quality of being alterable)

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

2 senses of unalterability

Sense 1
unalterability -- (the quality of not being alterable)
       => immutability, immutableness, fixity -- (the quality of being incapable of mutation; "Darwin challenged the fixity of species")

Sense 2
fixedness, unalterability -- (the quality of being fixed and unchangeable; "the fixedness of his gaze upset her")
       => changelessness, unchangeability, unchangeableness, unchangingness -- (the quality of being unchangeable; having a marked tendency to remain unchanged)