[StevenB]

Typically "synchro drive" refers to a system where the wheel orientations are synchronized. This is common on LEGO robots where it's much easier to make a system with 2-3 motors rather than 8. The words "holonomic" and "omni-directional" are more general, but commonly used in the robotics literature for these kinds of drivetrains.

This is one of the areas where FRC teams have been right at the state of the art in robotics, so we've developed a lot of our own terminology and classification for these things. In the robotics community, papers tend be titled things like "A novel holonomic robot drive platform". At best, drive systems get named after their inventors (e.g., Killough drive named after Steven Killough, or mecanum wheels named after the Swedish company Mecanum AB).