Vietnam
Out of those letters, I'd try America.
Austria
England
America
Harriet Tubbman
Grouper is the name of a fish. It is 7 letters and contains 2 r's.
One Goddess with 7 letters in her name is Demeter, in Greek mythology. Also ARTEMIS.
Giraffe has seven letters
BAHAMAS
A desert county with seven letters includes Algeria.
England and America to only name two. I would consider looking at a map or an atlas for future reference.