Assailed refers to an attack or a violent encounter. When looking for synonyms for this word, we can use words such as besieged, attacked, assaulted, bombarded, stormed, and charged. Each of these words has its nuances and connotations, but they all share the sense of something or someone being overwhelmed or encircled by force. "Beset" is another term we can use to replace assail, which means to be surrounded and overcome by danger or difficulty. "Besieged" involves a more extended and systematic attack, while "assaulted" signifies a sudden and violent attack. Regardless of which synonym you use, each word portrays a degree of aggression or hostile behavior.