Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
At first, the Pokemon anime went with 'ar-say-us' before settling with 'arc-e-us' as we hear more often now.
Source: https://comicbook.com/anime/news/pokemon-anime-arceus-debate-pronounciation/