The Extreme English Proficiency course is a set 5,500 words and expressions at a highly advanced level, introducing word meanings of low frequency of use and occurrence which might be difficult even for English native speakers themselves. This course includes vocabulary items required for the following exams: Cambridge Certificate of Proficiency in English (CPE) and the oral parts of Graduate Record Examinations (GRE) and Graduate Management Admissions Test (GMAT). The results of GRE and GMAT are taken into consideration when evaluating college candidates’ skills and knowledge. What guarantees success when taking both these exam, is, apart from the ability to think analytically, great linguistic expertise which includes advanced vocabulary. Mastering this set of vocabulary items allows the learners to understand highly complex and abstract statements and texts on any given topic, as well as to formulate their own opinions in a fluent manner, yet preserving various meaning differences. These skills correspond with C2 level of The Common European Framework of Reference for Languages.