What is another word for archrival?
Pronunciation: [ˌɑːt͡ʃɹˈa͡ɪvə͡l] (IPA) 
Archrival is a powerful word that describes a fierce adversary. Despite its potency, it can sometimes be repetitive to use the term repeatedly in writing or conversation. Luckily, there are numerous synonyms for archrival that can be used in its place. Some of them include nemesis, opponent, antagonist, rival, contender, foe, and enemy. Each of these words conveys a similar meaning to archrival in various scenarios. For example, nemesis may be used to describe a person who repeatedly thwarts your plans, while foe can indicate an adversarial relationship that has developed due to some argument or disagreement. Whatever synonym is chosen, they all capture the same essence of a difficult opponent.
