URSS Proper noun, URSS ▼ ▶

1. initialism of Uniunea Republicilor Sovietice Socialiste (USSR (Union of Soviet Socialist Republics, Soviet Union))
   Synonyms: Uniunea Sovietică

Appox. usage (any sense): less than 0.1 per million words

Uniunea Sovietică Proper noun, Uniunea Sovietică

1. Soviet Union

Usage unknown