Dogman
Arch Enemy was created in 1996.
Most people who have an arch-enemy, the arch- enemy is a person who has done them wrong. To have an animal as an arch Ðenemy is considered to be slightly abnormal.
An arch enemy is a particularly strong or powerful enemy.
Arch Enemy Entertainment was created in 2004.
Zatanna's arch enemy pre new 52 is Brother Night.
He-Man's skull-faced arch enemy is Skeletor.
Manifesto of Arch Enemy was created on 2009-02-27.
ignore both of them your arch enemy and the bff that your enemy turned aganist you.Get away from them
Bizzaro doesn't have an arch enemy, he just wants to take over the earth.
Arch Enemy: A hero's worst enemy, especially in a work of fiction. Mortal Enemy: An enemy who wants to kill a hero. source: http://encyclopedia.thefreedictionary.com/
Well, technically, they're the same thing. But I suppose you could say that an arch enemy is a forever enemy, as an enemy may just be your enemy for a few days.