* Professor: This is the most common and generally understood title for a senior academic. There are often further distinctions like "Full Professor," "Distinguished Professor," or named professorships (e.g., "The Smith Chair of Physics").
* Chair/Head of Department: This refers to the administrative head of a specific academic department, not necessarily the highest-ranking *teacher* but certainly a high-ranking member of the faculty.
* Dean: This is an administrative position overseeing a college or school within a university.
* Provost/Vice-Chancellor: These are high-level administrative positions, often overseeing all academic affairs at the university. While they may teach occasionally, their primary role is administration.
So, "Professor" is likely the closest single answer, but the precise rank and title can vary considerably.