The term 'MAKE BUBBLY' can be solved by two crossword solutions: ELATE (5 letters) and AERATE (6 letters). ELATE means to make someone very happy or excited, while AERATE means to introduce air or oxygen into something. Together, these two words suggest that the term 'MAKE BUBBLY' is referring to the process of adding air or oxygen to a liquid in order to create bubbles, such as when making sparkling wine or soda.