guarantor [guarantors](person or company that provides a guarantee) noun [UK: ˌɡæ.rən.ˈtɔː(r)] [US: ˌɡe.rən.ˈtɔːr]
sponsor [sponsors](person or organisation with responsibility (especially with a religious or financial aspect)) noun [UK: ˈspɒn.sə(r)] [US: ˈspɑːn.sər]