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.
Postcards originate from the Postcard Book, an item letting players send their friends Postcards in Poké Daxi on YouTube explains the Postcard Book in more detail.
Source: https://screenrant.com/how-to-connect-link-pokmeon-go-scarlet-violet/