| blank |
without marks or writing. |
| boom1 |
a deep, hollow sound, as from an explosion. |
| city |
a large and important town where many people live and work. |
| commander |
an officer who is the leader of a military unit. |
| deed |
an act or action. |
| early |
near the beginning of something. |
| equal |
having the same value, measure, or amount as something else. |
| fuel |
anything such as wood or gasoline that is burned as a source of energy. |
| guard |
to protect or pay close attention to something in order to keep it safe. |
| incredible |
difficult or impossible to believe. |
| job |
work a person does every day or every week and gets paid for. |
| rifle |
a gun that has a long barrel and that is shot from the shoulder. |
| smart |
intelligent; knowing a lot. |
| space |
the area that contains the entire universe beyond the earth. |
| uniform |
a special suit of clothing worn by all members of a particular group. |