invariable 10 Associations

changeless (similar term) constant (similar term) invariant (similar term) unvarying (similar term) fixed-income (similar term) hard-and-fast (similar term) strict (similar term)

unchangeable 12 Associations

changeless (similar term) unalterable (similar term) confirmed (similar term) fixed (similar term) frozen (similar term) set in stone (similar term) carved in stone (similar term)