The act of bombing, especially towns or cities(noun)
Heavy artillery fire(noun)
The incidence of an intense stream of high-energy particles directed at a substance(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "bombardment" in a sentence
"Although, in the very touristy areas, the bombardment is a constant reminder of Saigon."
"Thus, micrometeorite bombardment is an extremely important piece of the rings 'evolutionary puzzle because these impurities cause them to darken over time."
"As a heavy particle with no charge, it could be used as a powerful projectile in bombardment experiments."