1) Changelessness 2) Mathematical logic 3) The quality of being absolute 4) Unchangeability 5) Unchangeableness 6) Unchangingness 
In mathematical logic, a formula is said to be absolute if it has the same truth value in each of some class of structures (also called models). Theorems about absoluteness typically establish relationships between the absoluteness of formulas and their syntactic form. There are two weaker forms of partial absoluteness. If the truth of a formula i...
• (n.) The quality of being absolute; independence of everything extraneous; unlimitedness; absolute power; independent reality; positiveness.
Ab'so·lute·ness noun The quality of being absolute; independence of everything extraneous; unlimitedness; absolute power; independent reality; positiveness. 
[n] - the quality of being absolute
noun the quality of being complete or utter or extreme; `the starkness of his contrast between justice and fairness was open to many objections` noun the quality of being absolute; `the absoluteness of the pope`s decree could not be challenged`