Webster's Revised Unabridged Dictionary · 1913

Inadvertence

Inadvertence , noun

[Compare French inadvertance.]

1.
The quality of being inadvertent; lack of heedfulness or attentiveness; inattention; negligence; as, many mistakes proceed from inadvertence.
Inadvertency, or lack of attendance to the sense and intention of our prayers. — Jer. Taylor
2.
An effect of inattention; a result of carelessness; an oversight, mistake, or fault from negligence.
The productions of a great genius, with many lapses an inadvertencies, are infinitely preferable to works of an inferior kind of author which are scrupulously exact. — Addison

Also: Inadvertency