"growing anger" is correct and usable in written English.
You can use it when referring to a feeling of increasing anger. For example, "The teacher's growing anger was clear to everyone in the room."
They have also nursed a growing anger.
Anson's growing anger is also revealed.
Haftar watched the country's decline with growing anger.
Opinion polls show growing anger at super-earners.
Consumers have reacted with disbelief and growing anger.
The decisions have aggravated growing anger at the military council now running the country.
It does not, however, deal with corporations, an issue causing growing anger in Britain.
But, if Navalny remains free, he could capitalize on growing anger about egregious corruption among élites.
It was another sign of growing anger over China's rampant industrial pollution.
Perhaps fuelled by growing anger as the election approaches, 2016 will be a game-changing year.
There is a growing anger about the government's inability to control the violence.
