The crossword solution for the term 'Rival of Ancient Carthage' is Utica, which is a five-letter word. Utica was an ancient city located in North Africa, in what is now Tunisia. It was founded by the Phoenicians in the 8th century BC and was a rival of the nearby city of Carthage. Utica was a major trading port and a powerful city-state in its own right, but it was eventually conquered by the Romans in the 3rd century BC.