DIFFERENCE BETWEEN EARTHING AND GROUNDING

Almost both of these terms are used for same purpose, but still some how they differs.
Here are the some facts.

1. In USA term GROUNDING  is used but in UK term EARTHING is used.
2. GROUNDING is used where electrically excited part of network is taken in account or part of network where the currents are algebraically  zero such as VIRTUAL GROUNDING
3. Where is the EARTHING is mostly used for the dead part of network i.e any enclouser 
4. Term  EARTHING  is mostly used for protection purpose.