o, b, m, t, u are letters that make 'boom out'
boo, ut, out, boom, UT are words within 'boom out'
1 possible definitions for 'boom out'
Under this definition, boom out is a verb and has the following properties:
boom has the same meaning as boom out
'boom out' can be a type of sound, go.
boom, roar, roaring, thunder are derivatives of 'boom out'.