You're looking for a list of the 5000 most common English words, often referred to as a "word list" or "lexicon". Such a list can be useful for various applications, including:
(Notice: No rare vocabulary – these are the structural bricks of English.) 5000 most common english words list
Follow complex movies and TV shows without constant subtitles. You're looking for a list of the 5000
Knowing words by frequency offers a high "return on investment": 5000 most common english words list