Majuscule and Uppercase

Majuscule noun - One of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis.

Uppercase is a synonym for majuscule. In some cases you can use "Uppercase" instead the word "Majuscule" as a noun or an adjective.

Uppercase adjective - Relating to capital letters which were kept in the top half of a compositor's type case.

Majuscule is a synonym for uppercase in capitalization topic. You can use "Majuscule" instead the word "Uppercase" as a noun or an adjective.