The phrase "fierce fire" is correct and usable in written English.
It can be used to describe a very intense or powerful fire, often in a metaphorical sense.
Example: "The fierce fire consumed the dry forest, leaving nothing but ashes in its wake."
Alternatives: "intense blaze" or "ferocious flames."
Ammunition on board the Warrior ignited, causing a fierce fire to burn for many hours.
It has come under fierce fire from environmental groups for bankrolling projects that are "environmentally and socially destructive".
The 56-year-old told Le Parisien newspaper that police came under fierce fire from what he described as "real professionals" during the lengthy gun battle.
Inside the guest room, we sat on the carpets while Bushire's son fed the fierce fire in the stove with dry twigs.
Inside the guest room of a local commandant's house, we sat on the carpets while his son fed the fierce fire in the stove with dry twigs.
Eight vehicles from Greater Manchester Fire and Rescue Service attended the blaze and crew have worked through the night to bring the fierce fire under control, after it broke out in the Clifton area of Swinton at around 4.40pm yesterday.
We're promised fierce fire-fights, thundering engines and life-like explosions.
"I heard fierce firing and then saw the terrorists firing at the security force … Thank God I am alive.
Even the hardest of us would flinch as we got nearer to the site of the raid's centre, where fierce fires still raged.
There were dozens of small but fierce fires blazing in the pre-dawn gloom of Freedom Square when Mohammed Helwani arrived, summoned by walkie-talkie to the site of Aleppo's latest bombing.
A hijacked passenger plane sliced into the Pentagon today, triggering a thunderous explosion and fierce fires at the defense complex and killing and wounding an unknown number of people.
