| Answer | Crossword Clue |
|---|---|
| HEPA | Air filter acronym |
| HEPA | Acronym for a type of filter used in a vacuum |
| HEPA | Kind of air filter |
| HEPA | Type of air filter |
| INTAKE | Engine part with an air filter |
| TAC | Air Force acronym |
| SAC | Air Force acronym |
| MIG | Soviet air force acronym |
| NORAD | Acronym for North American Air Defense. |
