Arch-enemy
Opponent and arch-enemy are semantically related. In some cases you can use "Opponent" instead a noun phrase "Arch-enemy".
Opponent
Opponent noun - One that takes a position opposite another in a competition or conflict.
Arch-enemy and opponent are semantically related. You can use "Arch-enemy" instead a noun "Opponent".
Mutual synonyms
Both words in one sentence
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Arch-Enemy: Satan's Meaningful Name is derived from the Semitic "Shai'tan" meaning "adversary," and he builds himself up as the greatest opponent to God.
Source: Literature / Paradise Lost - As the series goes on, he inadvertently becomes The Heart in the Five-Man Band that is eventually formed as well as the Worthy Opponent and Arch-Enemy of the Big Bad, despite being nothing but a Cloud Cuckoo Lander Talkative Loon throughout the entire series.
Source: Seemingly Profound Fool -
His Arch-Enemy: the most pragmatic Catholic Priest alive during the Fourth Grail War is his most dangerous, personal opponent.
Source: The Antichrist
Cite this Source
Opponent and Arch-enemy. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/arch-enemy/opponent
Arch-enemy & Opponent. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/arch-enemy/opponent>.
Opponent or Arch-enemy. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/arch-enemy/opponent.