The 3D remake's "Eureka_Battle" file contains all of the text relating to battle, whether that be the menu text or the actual in-game text. This includes the names of the various commands. However, looking at the list, there are a significant number of commands that go unused in the final game.
The interview at the back of the FF3 DS Japanese strategy guide mentions that a multiplayer vs mode was conceptualized for the game, with numerous commands created just for it. That would imply that these commands are actually a remnant of this mode.
While the commands are listed in the file, there are no descriptions nor any significant indication of which commands belong to which jobs. Thus, the descriptions and job associations I provide are based on their appearances in other Final Fantasy games and are simply my speculation.