The term 'attacking fiercely' can be summarized by the crossword solution 'storming, ' which is an 8-letter word. Storming is a military tactic in which a group of soldiers or other combatants launch a sudden, aggressive attack on an enemy position. This tactic is often used to break through enemy lines and gain access to a strategic position. Storming is also used to overwhelm an enemy with a large number of attackers, making it difficult for them to defend themselves.