Is cheerleading a noun

Cheer is a noun or a verb. Example uses:

As a noun:

A cheer rose from the crowd when ball flew out to the park.

These flowers should bring some cheer to my aunt.

As a verb:

Cheer up, we're almost there.

Your calls always cheer me no matter what kind of day it's been.

Adverb forms of cheer are cheerfully or cheerily.

Adjective forms of cheer are cheerful or cheering.