None do so.
There is no such country. There is no country that starts with A and ends with T, let alone a 7-lettered one.
Tibet =D
tatertots
teapot
A teapot contains tea. The word teapot begins and ends with the letter t.
Tarantella is a 10 letter word. It begins with the letter T and ends with the letter A.
throat
Egypt is a country that ends in the letter t.
tegestologist
A teapot A TEAPOT!
Toilet.
Teapot!