Allah
Allah is the Arabic word for God and it refers to the one and only God, the Creator and Sustainer of everything that exists. Allah is not a "different God" but the same God worshiped by Jews, the God of Abraham, Moses, and Jesus.
The Arabic word, Allah, is very unique term in its meaning because it has no feminine or masculine version, it is general neutral so it perfectly describe God because he is not man.
Also, the word Allah has no plural form, it is uniquely one.