noun

legion

LEE-jun/ˈliːdʒən/

A very large number of people or things.

A legion of pebbles forms a densely packed heap.

A vast, densely clustered heap of small, individually recognizable pebbles, conveying a very large number of things without people or military imagery.
Etymology

A gathered body of soldiers broadened into the idea of a very large number.

More examples

  • A legion of volunteers arrives to help.
  • They face a legion of small problems.

Forms

legion

Similar words

multitude
A large number or crowd.
host
A large collection of people or things.