99 battles of beer

Is there a word to describe a song that essentially repeats the same words, each verse subtly different from its predecessor?

I ran into such a song the other day: Дорога на Берлин" ("The Road to Berlin"). The song starts out:

"We took Orel in battle, went through the whole city
And read the name of the last street:
Bryansk Street goes through the city,
But such a name is truly a battle cry;
Bryansk Street goes through the city,
It means that is our road, it means that is our road;
Bryansk Street will lead us westward."

The next verse runs:

"We took Bryansk in battle, went through the whole city
And read the name of the last street:
Minsk Street goes through the city,
But such a name is truly a battle cry;
Minsk Street goes through the city,
It means that is our road, it means that is our road,
Minsk Street will lead us westward."

After Minsk come Brest, Lublin, and Warsaw. The singer breaks off in the middle of the last verse and cries: "to Berlin!"

There's a more recent performance of this song on YouTube that goes through a different string of cities.

Rodents of Unusual Size?

"I don't think they exist."