guarantee / guaranty [ˈgɛrənti]
guarantee – n. & v. – n. – 1. a formal promise or assurance, especially concerned with the performance of manufactured products; 2. a person making a guarantee or giving a security; 3. a thing that makes something certain to happen or be the case; v. – 1. give or serve as a guarantee for – fulfillment; 2. give a promise of assurance; 3. secure possession of
guaranty – n. – 1. a written or other undertaking to answer for the payment of a debt or for the performance of an obligation by another person liable in the first instance; 2. a thing serving as a security for