What's the difference between stanch and stancher?

Stanch

Definition:

(v. t.) To stop the flowing of, as blood; to check; also, to stop the flowing of blood from; as, to stanch a wound.
(v. t.) To extinguish; to quench, as fire or thirst.
(v. i.) To cease, as the flowing of blood.
(n.) That which stanches or checks.
(n.) A flood gate by which water is accumulated, for floating a boat over a shallow part of a stream by its release.
(v. t.) Strong and tight; sound; firm; as, a stanch ship.
(v. t.) Firm in principle; constant and zealous; loyal; hearty; steady; steadfast; as, a stanch churchman; a stanch friend or adherent.
(v. t.) Close; secret; private.
(v. t.) To prop; to make stanch, or strong.

Example Sentences:

(1) This does not just apply to shale gas operations – conventional gas drilling also produces leaks, which can be stanched by a variety of technologies, including one known as "plunger lift".
(2) Damage control and stalemate Ron Dermer, Israel’s ambassador to the United States, attempted to stanch some of the diplomatic fallout but also made clear that Netanyahu would not change his positions against talks with Iran and some Palestinian leaders to better fit Obama’s preferences.
(3) The first nuclear cell response peak after challenging, including eosinophils, was stanched completely by CFA itself.
(4) The device can be strapped to the resection table, and all technical aspects of the TUR with the exception of blood stanching, can be simulated.
(5) A man nearby fell, shot in the back, and Hansen tried to stanch the bleeding with a bandanna while “the continuous bang of the gun” echoed through people’s screams.
(6) Supreme military council commander Salim Idris had to cut short a trip to France to try to stanch the flow.
(7) Active bleeding can be stanched by the injection method during emergency endoscopy.