| Answer | Crossword Clue |
|---|---|
| REEFS | Some protective barriers |
| RAMPARTS | Protective barriers. |
| DYKES | Protective barriers: Var. |
| IRONFENCES | Some ornamental barriers |
| BLOCKADES | Some trade barriers |
| MOATS | Some zoo barriers |
| TOLLGATES | Barriers on some turnpikes. |
| CONIC | Like some traffic barriers |
| REEFS | Some barriers to entry in the shipping business? |
