What is another word for spreading like wildfire?

Here are some words and phrases that convey a similar meaning to "spreading like wildfire," depending on the specific nuance you want:

Emphasis on speed:

* Rapidly

* Instantly

* Immediately

* Like a flash

* At lightning speed

* With breakneck speed

Emphasis on widespread reach:

* Ubiquitous

* Pervasive

* Widespread

* Pandemic

* Contagious

* Viral

Figurative expressions:

* Catch on like wildfire

* Go viral

* Spread like a plague

* Take off like a rocket

* Take the world by storm

* Run rampant

More specific examples:

* If the news is good, it will spread like wildfire.

* The rumor spread like a disease.

* The trend went viral on social media.

* Her song took the world by storm.

The best choice will depend on the context of your writing and the specific meaning you want to convey.