Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.
When I typed Bellefontaine, Neighbors automatically filled in. When I typed Breckenridge, Hills did not fill in. When I typed Clarkson, Valley did not fill in. It might be nice to have it more consistent. I should have gotten so many more of these than I did.