Letters that make hubbub
b, h, u are letters that make 'hubbub'
hubbubs is a word created by adding a letter to 'hubbub'
1 possible definitions for 'hubbub'
Under this definition, hubbub is a noun and has the following properties:
uproar, brouhaha, katzenjammer have the same meaning as 'hubbub'
'hubbub' can be a type of noise.
rackety, rip-roaring, uproarious are derivatives of 'hubbub'.