What are some good spices for flavoring coffee?

What are some good spices for flavoring coffee?

Butter.

I actually have an exhaustive list here for you, user. Anything not on the list is unacceptable:

cardamom

Would coriander or turmeric work as a substitute?

Yes

Cinnamon is good

coffee grounds

never tried it, but maybe nutmeg?

What about allspice?

ehhhh