One possibility is, Master of Theological Studies.

The Journal of Theological Studies was created in 1899.

Asian Center for Theological Studies was created in 1968.

John Leland Center for Theological Studies was created in 1998.

A master of arts degree is typically associated with secular fields such as history or music whereas a master of theological studies is unique to the field its name indicates. Also an MA from a seminary can be considered to be a terminal degree in its field and the assumption with an MTS is that the student will pursue doctoral studies. A master of arts degree is typically associated with secular fields such as history or music whereas a master of theological studies is unique to the field its name indicates. Also an MA from a seminary can be considered to be a terminal degree in its field and the assumption with an MTS is that the student will pursue doctoral studies.