Originally Posted by JamesNoBrakes

Yes.

All I can find says hoarfrost forms exactly the same as frost, except higher humidity leads to bigger crystals extending further off of the surfaces.

Freezing fog is the same as freezing rain, it's just fog that freezes instantly when it touches a surface.

Ice fog is ice crystals suspended, these may "fall" to the ground and not adhere. Ice fog IS a common occurrence in the North latitudes, but pretty obvious and blows off rather quick.