perhaps this will help
bombard
vt to attack with artillery; to batter or pelt; to subject to a succession of blows or impingements; to assail, eg with questions (); to subject (eg an atom) to a stream of high-energy particles ().
n an early cannon for throwing stones, etc; a large liquor-jug, a blackjack (); a bass reed stop on the organ; (also bombarde) a shawm.
[OFr bombard an old cannon for firing stones or shot; see also ety of bomb]
bombardier or n the lowest non-commissioned officer in the British artillery; the person in a bomber who aims and releases the bombs.
bombardment n.
bombardon (or ) n the bass tuba.
bombardier beetle n a beetle that explosively discharges an acrid volatile fluid.
\u00A9 Chambers Harrap Publishers Ltd: The Chambers Dictionary 2003; The Chambers Thesaurus 2004