all:
invariable.
changing, changeable:
stable,
unchangeable,
unvarying,
invariable,
unchanging.
noun:
established,
abiding,
equable,
inelastic,
even,
dependable,
uniform,
durable,
tried,
sure,
persistent,
reliable,
lasting,
trusty,
tried and true,
ramrod,
trustworthy,
hard-and-fast,
unvaried,
predictable,
permanent,
true,
immutable.
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