There are none.
There is no country that begins with "y" and ends with "i." There is no country that begins with "y" and ends with "u," either. Currently, the only country in the world that begins with "y" is Yemen. Yugoslavia is now called Serbia & Montenegro.
The word impromptu begins with i and ends with u.
But U
No word in the English language begins with U and ends with J.
A noun that begins with U and ends with D is unitard, upland, or the undead.
Uruguay is a country in South America that begins with U.
FLU
whoeverwrotethestupidquestionobviouslyloser!
Ursula, utopia
Nauru starts with N and ends with U. Nauru is an island country in Micronesia.
Unfix is a 5 letter word. It begins with U and ends with X.
· Uganda