"M, m" is a single letter of the English alphabet. Though it might seem limited, there are several terms that you can use to refer to it. Some of the synonyms for "M, m" include "em," "eme," "ma," "me," and "case m." The term "em" is usually spelled out as "e-em," while "eme" is commonly used as a technical term to refer to the letter M in typography. On the other hand, "ma" is a less common synonym for "M, m," often used in reference to the mother in Indian culture. Meanwhile, "me" is another common informal synonym for the letters M and m.