Prize ring and Rings

Prize ring noun - A square ring where boxers fight.

Rings and prize ring are semantically related. In some cases you can replace term "Rings" with "Prize ring", this terms are similar.

Rings noun - Gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises.

Prize ring and rings are semantically related. You can use "Prize ring" instead a noun "Rings".