Letters that make ICBM
b, c, m, i are letters that make 'ICBM'
1 possible definitions for 'ICBM'
Under this definition, icbm is a noun and has the following properties:
intercontinental ballistic missile has the same meaning as ICBM
'ICBM' can be a type of ballistic missile.
Minuteman is a type of ICBM.