Jinn or djinn is a word we middle east people use for demons. I found this word in an English dictionary too, but it seems that this word is never used in plural form. For example, when you want to say "I was attacked by three demons" it works, and Microsoft Word did not underline it, but when using "Jinns" it seems not correct. What do you think about it? What is the right way to say "three jinns"?