Welcome to Michael Buckhoff’s TOEFL iBT Vocabulary List. After many years of teaching students how to prepare for the TOEFL iBT Exam, Michael noticed he was seeing the same words over and over again. He began to make a list of these words and did not find a repetition until he reached 1,700 total words. There are 1,700 words in this list divided into two categories. The first category is 200 words of intermediate level reading. The second is 1,500 words of advanced level reading.