my answer to the thread http://www.jesus-christ-forums.com/home/viewtopic.php?t=1502
We muslims prefer the Arabic word Allah to the English word God, because this English word God is often misused or misapplied. In English, if some gentleman was to took after sombody's child as a guardian, we would say that he is a godfather to the child, and the woman a godmother to the child. And if one tried to be a bit too funny, a bit too clever, one would say, 'What do you think of yourself, are you a tin god?" We spell god with a capital "G" (God), and we spell god with a small "g" (god), which creates in your minds grades and grades of divinities.
The word Allah is never used in any other sense. There is no such things as Allah-father or Allah-mother or a Tin-Allah. Allah is a unique word for the only God. Arabic, like every other language, also has its rules of grammar, but in Arabic you cannot make a plural form for Allah, nor can you make a feminine of Allah such as the word Gods, Goddess... or Godling.