Unruly crowds are also called mobs.
That would be a mob.
mob
mob
The official definition for the word mobbed is "crowd around (someone) in an unruly and excitable way in order to admire or attack them."
The bartender looked up. Tonight's crowd seemed a tad more unruly than normal. "Quiet down!" he called to the patrons.
The first thing that comes to my mind when I think of a large crowd is a mob. If that is not a good word choice, then how about throng?
They told me that Jack's behavior had become increasingly unruly, that he had run around half naked, like a savage, and that he had killed two other boys. The police were worried that the large crowd of spectators might grow unruly.
hippie, oddity, ornery, unruly
a huge crowd
No, the word 'unruly' is an adjective, a word that describes a noun. The abstract noun form of the adjective unruly is unruliness.
A mischievous child is called unruly. It begins with the letter u.
Your kids are so unruly!
crowd
crowd