Warranter

1. n. One who assures, or covenants to assure; one who contracts to secure another in a right, or to make good any defect of title or quality; one who gives a warranty; a guarantor; as, the warranter of a horse.
2. n. One who warrants, gives authority, or legally empowers.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.