Dictionary & Thesaurus

unalterability

1.	(noun) the quality of not being alterable
	Related Words: immutability, immutableness, incurability
	Antonyms: alterability

2.	(noun) the quality of being fixed and unchangeable; "the fixedness of his gaze upset her"
	Synonyms: fixedness
	Related Words: changelessness, unchangeability, unchangeableness, unchangingness