(n.) An attack upon a fortress or fortified town, with shells, hot shot, rockets, etc.; the act of throwing bombs and shot into a town or fortified place.

air raid alpha decay atom-chipping atom-smashing atomic disintegration atomic reaction atomization beta decay blitz blitzkrieg breeding broadside bullet burst cannonade chain reaction cleavage disintegration series dissociation drumfire exchange reaction fission fission reaction fusillade gamma decay hail ionization lightning attack lightning war neutron reaction nonreversible reaction nuclear fission nucleization photodisintegration proton gun proton reaction reversible reaction salvo shower splitting the atom stimulation strafe strafing target thermonuclear reaction volley