nouns
any utterance produced simultaneously by a group
"a chorus of boos"
is a type of (narrower)
the sudden occurrence of an audible event
"the sound awakened them"
a group of people assembled to sing together
is a type of (narrower)
an organization of musicians who perform together
the part of a song where a soloist is joined by a group of singers
a body of dancers or singers who perform together
a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play