The software comes with a 'money-back guarantee'. [=a promise that the money you spend on a product will be returned if the product is not good enough]
We used our house as a 'guarantee' for the loan. [=we said that the bank could take our house if we did not pay back the loan]
There is no 'guarantee' that they will approve the contract. [=there is no way to be sure that they will approve it]
(..) We hit a few speed bumps early on. It began to anticipate where the food would come from. One of the handlers nearly lost an arm. The others threatened to quit if I couldn't guarantee their safety. She's intelligent then? For a dinosaur. And that? It tried to break the glass. I like her spirit. (..)2015 Jurassic World