In the following sentence, replace the word "bridge" with a synonym.
The bridge linking the two countries was completed in 2021.
The causeway linking the two countries was completed in 2021.
Complete the following task based on the instruction and optional input provided.### Instruction:
In the following sentence, replace the word "bridge" with a synonym.

### Input:
The bridge linking the two countries was completed in 2021.

### Output:
The causeway linking the two countries was completed in 2021.