Enter a clue or pattern or both:
The Clue
City renamed Ulan Bator in 1924 (4 letter answer)
The Answer
URGA
Tags
Notes
The answer URGA is so rare that it appears less than once every 2500 puzzles.
Definition
URGA as a noun:
1. (Ulan Bator, Ulaanbaatar, Urga, Kulun, capital of Mongolia) = the capital and largest city of Mongolia