Half nelson and Nelson

Half nelson noun - A wrestling hold in which the holder puts an arm under the opponent's arm and exerts pressure on the back of the neck.

Nelson and half nelson are semantically related. In some cases you can use "Nelson" instead a noun phrase "Half nelson".

Nelson noun - Any of several wrestling holds in which an arm is passed under the opponent's arm from behind and the hand exerts pressure on the back of the neck.

Half nelson and nelson are semantically related. Sometimes you can replace phrase "Half nelson" with "Nelson", this terms are similar.