Onslaught (noun) — هجوم شرس أو اندفاع: A fierce or destructive attack. Below are 8 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
A violent attack; an aggressive attempt to harm someone; a concentrated effort to overcome resistance; to attack vigorously
To take aggressive action against; to assault or assail; to criticize harshly; to begin to affect harmfully; to tackle a problem with vigor
A concentrated attack; a continuous outpouring; an artificial barrier; heavy gunfire; an overwhelming amount
To demand payment, accuse formally, or fill with energy/responsibility; as a noun: the fee, accusation, or electric load — also the duty you are given
a heavy fall of rain; a severe flood; an overwhelming quantity or number of things arriving simultaneously
Causing anger or hurt; an attack.
blitzstorm
An armed entry into a country; an unwelcome intrusion.