We don't have synonyms for master class yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are masterclass, master plans and master cast.
°A class, typically in a performing art such as music or drama, in which a teacher listens to and critiques the performance of individual students, one at a time, while the other students look on.
°A class, typically in a performing art such as music or drama, in which a teacher listens to and critiques the performance of individual students, one at a time, while the other students look on.