inerrant
1. [ adjective ] not liable to error
Synonyms: unerring inerrable
Examples:

"the Church was...theoretically inerrant and omnicompetent"-G.G.Coulton "lack an inerrant literary sense" "an unerring marksman"

Related terms: infallible
Similar spelling:   inherent
  inerrancy
  inherently
  in_earnest
  inherence
  innermost
  inhere_in