When it comes to studying at the principal level, there are several different synonyms you can use to describe this type of education. Some common words that can be used instead of "study at principal" include "advanced," "prestigious," and "honors." Advanced study typically refers to courses or programs that are designed for students who have already completed a certain level of education and are looking to further their knowledge in a specific area. Prestigious study refers to programs or courses that are highly respected in a particular field or industry. And honors study typically involves additional coursework or projects that are designed to challenge and engage high-achieving students.