IPA: /bəmˈbɑrdmənt/
KK: /bɑmˈbɑrdmənt/
A heavy attack or continuous firing of artillery or bombs, often directed at a specific target such as a city or military position.
The city suffered extensive damage due to the relentless bombardment during the war.
Bombardment is formed from "bombard" (from Middle French *bombarder*, meaning to attack with bombs) and the suffix "-ment" (meaning the action or process of). The word refers to the action of attacking or bombarding a place with bombs or artillery.
Think of the action of 'attacking' ('bombard') with bombs, and the '-ment' indicates the process of that action. This helps you remember that bombardment means the process of attacking with bombs.
No commonly confused words.