Bankrolling, which refers to providing financial support or backing to a project or person, can be described using various synonyms. Funding is one such option, which means providing the necessary monetary resources for a particular purpose. Finance can be another synonym, which refers to the management of money and other financial resources. Sponsoring can also be used, which involves promoting and supporting an individual or organization's activities. Similarly, backing refers to supporting financially or morally. Investing, financing, and underwriting are other synonyms that describe the act of providing financial support. Ultimately, the word chosen will depend on the context and desired emphasis of the sentence.