The term Tippy-Top can be defined as the highest point or peak of something. It can also be used to describe the best of something. In this crossword, the solutions for Tippy-Top are ACME and APEX, both of which are four letter words. ACME is derived from the Greek word akme, meaning the highest point or peak. APEX is derived from the Latin word APEX, meaning the highest point or summit. Both words can be used to describe the highest point or peak of something, making them perfect solutions for the term Tippy-Top.