An opponent is in opposition. An enemy not only opposes but causes harm & injury. Ex. All sports are contestants between opponents, but they do not have to be wars amongst enemies.
opponent, foe, adversary
adversaries means rival or better yet, enemy. Another way to describe adversaries are intruders. You get it. Basically, it means a meddlesome opponent.
That is the correct spelling of the word "enemy" (foe, opponent).
That is the correct spelling of "nemesis" (enemy, opponent, or foe).
enemy, opposer, rival, opponent
Some examples are: enemy, adversary, antagonist, arch-enemy, assailant, bitter enemy, combatant, devil, open enemy, opponent, opposing party, opposite camp, public enemy, sworn enemy
opponent, foe
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.
enemy
opponent, foe, adversary
That could be an enemy combatant or an antagonist or an opponent.
adversary, rival, foe, opponent
The ultimate opponent, the great enemy.
An antipathist is a person who acts as an enemy or opponent.
enemy, foe, opponent, competitor
A foe is an enemy or opponent in a conflict or competition. It refers to someone who is opposed to you or your interests.