2 articles
Imperator
Imperator, Latin "commander", was a Roman honorific saluted to victorious generals, first recorded for Scipio in Iberia, later the emperor's praenomen and root of "emperor".
Imperium
Imperium was the supreme executive power of the Roman state, distinct from the lesser potestas, held by consuls, praetors, and dictators, and covering military command and the death penalty.