Related Clues:
- Equal volume is central to currency
- A personal enemy
- Persians, to the 300, e.g
- Sworn rival
- Evil rival
- Competitor; be as good as
- He's full of enmity, principally
- Environmentalists' enemy
- Unfriendly opponent?
- Adversary's vocal imitation
- Competing opponent
- Speak of false friend never!
- Friends of the Earth's opponent?
- The enemy love wearing iron
- Enemy leader of old, iron-clad?