This is the 10680th most frequent Russian word.
вонь
A strong, unpleasant smell; stench.
"Вонь" here is used as a noun to describe an unpleasant smell.
В комнате была какая-то странная вонь.
There was a strange stench in the room.
Here, "вонь" is again a noun emphasizing the pervasive nature of the smell.
Эта вонь наполнила весь дом.
This stench filled the entire house.
In this sentence, "вонь" is used as a direct object of disgust indicative of a strong aversion.