Dear user list,
I have created a wiki page which compares ArcGIS terminology to GRASS GIS one. The purpose is to help people learn GRASS GIS when they already know ArcGIS and are confused from different terminologies. If you have some experience in this area, please feel free to extend the page.
http://grasswiki.osgeo.org/wiki/Terminology_comparison_between_ArcGIS_and_GRASS_GIS
Note that this page does not intent to replace the existing pages on similar topics (linked in the See also). The new page should be just about the words not how to do things.
Vaclav