| Answer | Crossword Clue |
|---|---|
| enemy | a hostile foe |
| enemies | ENEMY, a hostile foe |
| foe | an enemy (a hostile foe) |
| fone | FOE, an enemy (a hostile foe) |
| foen | FOE, an enemy (a hostile foe) |
| iff | Identification, Friend or Foe: a system of transmitters and transponders that uses coded signals to distinguish between friendly and hostile aircraft |
