I web-scraped SpanishDict's "1000 Intermediate Words" and "1000 Advanced Words" vocabulary lists.
The intermediate and advanced words are separated into two decks, so this package technically contains about 2000 words.
This deck also contains a reverse deck, so you can practice Spanish —> English and English —> Spanish.
If you'd like to see the SpanishDict vocab lists, here they are:
Intermediate:
https://www.spanishdict.com/lists/506024/intermediate
Advanced:
https://www.spanishdict.com/lists/506021/advanced