Looking on the internet deeply has found these results:

DANGER is the most popular phrase on the web.

PERIL 126,200,000 results on the web	DANGER 1337,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Double their peril... double your winnings. Then you are cast into the gorge of eternal peril. They both empower our promise and our peril. An enduring tradition, to the imminent peril of all the pretty housemaids. With every hour that passes, peril draws closer. The short path doubles the peril to your four players. Appearing before them is a peril. Ignore the truth at your own peril, sir.	UNLESS THERE IS AN EMERGENT CIRCUMSTANCE SUGGESTING IMMINENT DANGER, Danger of conflict of competences between the institutions involved. WELL, THE DANGER IN LIPOSUCTION IS INTERNAL BLEEDING. Unexploded bombs still present a deadly danger. BUT ONCE I WAS TURNED, I BECAME A DANGER TO THEM ALL. NO, I DO NOT FEEL AT THIS MOMENT THAT I'M OTHERWISE A DANGER TO MYSELF. Inevitably, the prison staff also face an immediate danger. Labelling them all as corrosive with the key word DANGER serves no good purpose and again puts the entire process at risk.

PERIL

126,200,000 results on the web

DANGER

1337,000,000 results on the web

More popular!

UNLESS THERE IS AN EMERGENT CIRCUMSTANCE SUGGESTING IMMINENT DANGER,
Danger of conflict of competences between the institutions involved.
WELL, THE DANGER IN LIPOSUCTION IS INTERNAL BLEEDING.
Unexploded bombs still present a deadly danger.
BUT ONCE I WAS TURNED, I BECAME A DANGER TO THEM ALL.
NO, I DO NOT FEEL AT THIS MOMENT THAT I'M OTHERWISE A DANGER TO MYSELF.
Inevitably, the prison staff also face an immediate danger.
Labelling them all as corrosive with the key word DANGER serves no good purpose and again puts the entire process at risk.