philanthropist (n.)

• almoner
• almsgiver
• angel
• assignor
• backer
• benefactor
• benefactress
• bestower
• conferrer
• consignor
• contributor
• do-gooder
• donor
• giver
• grantor
• humanitarian
• patron
• patroness
• presenter
• settler
• sponsor
• subscriber
• supporter
• testate
• testator
• testatrix