Synonyms: immutability, immutableness, fixity
Definition: the quality of being incapable of mutation
Usage: Darwin challenged the fixity of species
Similar words: unchangeability, unchangeableness, unchangingness, changelessness
Definition: the quality of being unchangeable; having a marked tendency to remain unchanged
Synonyms: secureness, fixedness, fixity, fixture, fastness
Definition: the quality of being fixed in place as by some firm attachment
Similar words: immovability, immovableness
Definition: not capable of being moved or rearranged