Death chair and Instrument of execution

Death chair noun - An instrument of execution by electrocution; resembles an ordinary seat for one person.

Instrument of execution and death chair are semantically related. In some cases you can use "Instrument of execution" instead a noun phrase "Death chair".

Instrument of execution noun - An instrument designed and used to take the life of a condemned person.

Death chair and instrument of execution are semantically related. Sometimes you can replace phrase "Death chair" with "Instrument of execution", this phrases are similar.