From Longman Dictionary of Contemporary Englishcannonadecan‧non‧ade /ˌkænəˈneɪd/ noun [countable] PMa continuous heavy attack by large guns
Examples from the Corpus
cannonade• If there is a cannonade, an explosion, you will be the first to experience it.• A deceitful day that makes one think of lilacs and daffodils, before blasting you with another cannonade of winter.• They frequently shifted and broke apart under the warming sun, sounding like thunder, booming cannonades and shotgun blasts.• The position was now subjected to a heavy cannonade, and a combination attack followed.• On the fifteenth of July began the cannonade.• Their cannonade, although impressive, was quite ineffective. 