Synonyms: unerring, inerrable, inerrant
Definition: not liable to error
Usage: the Church was...theoretically inerrant and omnicompetent-G.G.Coulton; lack an inerrant literary sense; an unerring marksman
Similar words: infallible
Definition: incapable of failure or error
Usage: an infallible antidote; an infallible memory; the Catholic Church considers the Pope infallible; no doctor is infallible