The term 'ADDS FUEL TO' can be summarized by two crossword solutions: 'FEEDS' (5 letters) and 'STOKES' (6 letters). Both words refer to the act of providing fuel or energy to something, either literally or figuratively. 'Feeds' is a verb that means to provide food or sustenance to something, while 'STOKES' is a verb that means to stir up or increase the intensity of something. Therefore, both words can be used to describe the act of adding fuel or energy to something.