Barbed wire and Concertina

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

Concertina and barbed wire are semantically related. In some cases you can replace term "Concertina" with "Barbed wire", this terms are similar.

Concertina noun - Coiled barbed wire used as an obstacle.

Barbed wire and concertina are semantically related. Sometimes you can use "Barbed wire" instead a noun "Concertina".