This is the 696th most frequent Russian word.
война
War.
Here, 'война' is used in a historical and literal context referring to an armed conflict.
Война началась рано утром.
The war started early in the morning.
In this sentence, 'война' is used metaphorically to represent an intense disagreement or competition.
Между ними шла настоящая война за внимание учителя.
There was a real war between them for the teacher's attention.
This usage of 'война' refers to the specific historical event, the global military conflict.