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.
Additionally, it is important for players to note that there are several crystals exclusive to certain packs, such as Jungle Adventure or Get to Work, but the collection methods remain the same.
Source: https://gamerant.com/the-sims-4-all-collections-guide/