Etymologically speaking, is it a coincidence that the words "god" and "dog" are reversals of each other?

YES of course. god comes from gott in germanic language and it has nothing to do with dogs.just like divine which has roots in latin have no connection with dogs in any war, in reality as well as in a linguistic sense. why would 'god' have any connection with a dog? only canine god anywhere is Anubis, egyptian god of mummification and he's actually a jackal.