Wariness, n.
The quality or state of being wary; care to foresee and guard against evil; cautiousness. "An almost reptile wariness." G. W. Cable. To determine what are little things in religion, great wariness is to be used. Sprat.
Syn. -- Caution; watchfulness; circumspection; foresight; care; vigilance; scrupulousness.
Shades of meaning
Fernald has no entry of its own for wariness; he lists it under care.
Where he writes about it:
Watchfulness recognizes the possibility of danger, wariness the probability. — from care
A man who is not influenced by caution to keep out of danger may display great wariness in the midst of it. — from care