1) Changelessness 2) Invariability 3) Invariableness 4) It may be conformal 5) Unchangeability 6) Unchangeableness 7) Unchangingness 1) Invariableness 2) Unvariedness 
[magazine] Invariance is a French magazine edited by Jacques Camatte, published since 1968. It emerged from the Italian left-communist tradition associated with Amadeo Bordiga and it originally bore the subtitle `Invariance of the theory of the proletariat`, indicating Bordiga`s notion of the unchanging nature of communist theory. However i...
• (n.) The property of remaining invariable under prescribed or implied conditions.
In·va'ri·ance noun (Math.) The property of remaining invariable under prescribed or implied conditions. J. J. Sylvester.