Death row is a slang term for section of a prison in which prisoners are housed who are under death sentences and are awaiting appeals and/or potential execution.
A death penalty is the sentence of execution for murder and some other capital crimes (serious crimes, especially murder, which are punishable by death). The death penalty, or capital punishment, may be prescribed by Congress or any state legislature for murder and other capital crimes. The Supreme Court has ruled that the death penalty is not a per se violation of the Eighth Amendment's ban on cruel and unusual punishment. Furthermore, the Sixth Amendment does not require a jury trial in capital crime cases.