Empty space is a term used to describe an area that is not filled with matter. It can be described in many ways, such as a VACUUM (6 letters), GAP (3 letters), HOLE (4 letters), VOID (4 letters), AIR (3 letters), or LACUNA (6 letters). A VACUUM is a space that has been emptied of all matter, while a GAP is a space between two objects. A HOLE is an opening in a solid object, and a VOID is an empty space without any matter. AIR is the mixture of gases that make up the atmosphere, and a LACUNA is an unfilled space or GAP.