| Answer | Crossword Clue |
|---|---|
| REDOUBT | Defensive fortification |
| fosse | moat or defensive ditch in a fortification, usually filled with water |
| fosses | moat or defensive ditch in a fortification, usually filled with water |
| foss | moat or defensive ditch in a fortification, usually filled with water |
| blockhouse | a wooden or concrete fortification with ports or loopholes for defensive fire, observation, etc |
| blockhouses | BLOCKHOUSE, a wooden or concrete fortification with ports or loopholes for defensive fire, observation, etc |
