SOWPODS Explained
The term SOWPODS was coined to cover the convergence of the two International Scrabble word sources, OSW and OSPD, as deployed for the 1991 World Scrabble Championships in London and subsequent World Championships. SOWPODS is an acronym derived from anagramming OSW and OSPD.

OSW itself stands for Official Scrabble Words, a publication derived solely from the Chambers Dictionary, published in Scotland. OSW is exclusively used in the United Kingdom only.

OSPD stands for Official Scrabble Players Dictionary, a publication derived primarily from the Merriam-Websters Dictionary, but also including words from four other major college dictionaries. It is published by Merriam-Webster, in the United States. OSPD is exclusively used in North America, Thailand,and Israel.

The following countries are known to be fully SOWPODS:-

Australia
Bahrain
England
Ghana
Hong Kong
India
Japan
Kenya
Kuwait
Malaysia
Malta
New Zealand
Nigeria
Oman
Pakistan
Philippines
Qatar
Saudi Arabia
Singapore
South Africa
Thailand
Trinidad
United Arab Emirates
United Kingdom