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Synonyms for Bombardment (same or very similar meaning)

WordNet sense 1 (the rapid and continuous delivery of linguistic communication (spoken or written)):
barrage, onslaught, outpouring

WordNet sense 2 (the heavy fire of artillery to saturate an area rather than hit a specific target):
battery, shelling, barrage fire

WordNet sense 3 (an attack by dropping bombs):
bombing


From the ODE community, based on WordNetadd/edit