The term 'occupies completely' can be described by three different crossword solutions: FILLS (5 letters), ENGROSSES (9 letters), and TIESUP (6 letters). Fills is a verb that means to occupy or take up space with something, such as filling a container with liquid. Engrosses is a verb that means to absorb someone's attention or interest completely. Tiesup is a verb that means to occupy or restrict the movement of something, such as tying up a rope. All three words describe the concept of occupying something completely, either through taking up space, absorbing attention, or restricting movement.