The term 'grant giver' is used to describe someone who donates money or resources to a cause or organization. The two crossword solutions for this term are 'DONOR' (5 letters) and 'BENEFACTOR' (10 letters). A DONOR is someone who gives money or resources to a cause or organization, while a BENEFACTOR is someone who gives money or resources to a person or group of people. Both terms refer to someone who provides financial support to a cause or person.