Word Study
exorbitancy
CIDE DICTIONARY
exorbitancy, n.
A going out of or beyond the usual or due limit; hence, enormity; extravagance; gross deviation from rule, right, or propriety; as, the exorbitances of the tongue or of deportment; exorbitance of demands. Dryden. [1913 Webster]
"The lamentable exorbitances of their superstitions." [1913 Webster]
For further exploring for "exorbitancy" in Webster Dictionary Online