Barbed wire and Roadblock

Barbed wire noun - Strong wire with barbs at regular intervals used to prevent passage.

Roadblock and barbed wire are semantically related. In some cases you can use "Roadblock" instead a noun phrase "Barbed wire".

Roadblock noun - Any condition that makes it difficult to make progress or to achieve an objective.

Barbed wire and roadblock are semantically related. Sometimes you can use "Barbed wire" instead a noun "Roadblock".