It is probably worth trying to figure out what exactly the recipe author means by cinnamon. Cassia Bark is what is often called cinnamon and that isn't what is generally sold as ground cinnamon, the true cinnamon has a more intense smell and you wouldn't use as much as you would use cassia. Even if the flavour profiles are similar. Some uncommon spices are: nutmeg/mace, ajwain seeds, caraway seeds. I don't know if I have seen all of these in bases, but I know some of these are common.