The term 'BACKS FINANCIALLY' can be broken down into two crossword solutions: ENDOWS (6 letters) and FUNDS (5 letters). ENDOWS is a verb meaning to provide with money or other resources, usually in the form of a grant or donation. FUNDS, on the other hand, is a noun referring to a sum of money set aside for a particular purpose. Both words are used to describe the act of providing financial support to someone or something.