Source : Webster's Revised Unabridged Dictionary (1913)

Inerrancy \In*er"ran*cy\, n.
   Exemption from error.

         The absolute inerrancy odf the Bible.    --The Century.

Source : WordNet®

inerrancy
     n : (Christianity) exemption from error; "biblical inerrancy"
         [ant: {errancy}]