| fortress wall | 0.66 | The low sun lit the fortress walls with yellow light. | ||
| fortress prison | 0.39 | Hundreds of squatters now occupy the abandoned fortress prison. | ||
| fortress mentality | 0.33 | Some claim a fortress mentality is driving Americans to insulating themselves from all risks at any cost. | ||
| fortress town | 0.26 | It was a sentiment expressed even more forcefully in Monteriggioni, a ancient fortress town near Siena. |