The term 'KIND OF BASE' can be solved by three different crossword solutions: NAVAL (5 letters), DATA (4 letters), and FIRST (5 letters). NAVAL refers to a type of base that is used by the navy, such as a naval base or a naval station. DATA is a type of base that is used to store information, such as a database or a DATA warehouse. FIRST is a type of base that is used in sports, such as a FIRST base in baseball or a FIRST down in football.