Lariat

Part of speech: noun (n.)

A long, slender rope made of hemp or strips of hide, esp. one with a noose; -- used as a lasso for catching cattle, horses, etc., and for picketing a horse so that he can graze without wandering. [Mexico & Western U.S.]

Part of speech: verb (v.)

To secure with a lariat fastened to a stake, as a horse or mule for grazing; also, to lasso or catch with a lariat. [Western U.S.]