https://www.merriam-webster.com/thesaurus/invariability
INVARIABILITY Synonyms: 36 Similar and Opposite Words | Merriam-Webster Thesaurus
Synonyms for INVARIABILITY: stability, consistency, fixedness, immutability, steadiness, unchangeableness, changelessness, constancy; Antonyms of...
opposite wordsmerriam webstersynonymssimilarthesaurus