Spree killer and Serial killer

Spree killer noun - A serial killer whose murders occur within a brief period of time.

Serial killer and spree killer are semantically related. In some cases you can use "Serial killer" instead a noun phrase "Spree killer".

Serial killer noun - Someone who murders more than three victims one at a time in a relatively short interval.

Spree killer and serial killer are semantically related. Sometimes you can replace phrase "Spree killer" with "Serial killer", this phrases are similar.