Crossword clues for Sparta's rival 6 lettersAnswerClueATHENSSparta rivalATHENSOld rival of SpartaATHENSSparta's rivalATHENSRival of SpartaARGOSSparta's rivalARGOSStrong rival of SpartaARGOSLongtime rival of SpartaARGOSRival of Sparta and AthensARGOSRival of SpartaARGOSOld rival of SpartaARGOSAncient city of Greece, rival of Sparta.ARGOSAncient rival of SpartaARGOSCity that rivaled ancient SpartaARGOSRival of ancient Sparta