This is the 7261st most frequent Russian word.
волга
The Volga is a major river in Russia.
Here 'Волга' refers to the famous geographical landmark, the major river in Russia known as the Volga River.
Волга — великая река России.
The Volga is a great river of Russia.
In this sentence, 'Волга' again denotes the geographical name of the river.
На берегу Волги стоит старинный город.
There is an old town situated on the banks of the Volga.
Here, 'Волга' is used as the given name of an object, specifically a boat, showcasing its use in a different context such as naming an item.