The word "beserk" denotes a state of extreme anger or out-of-control behavior. However, there are several synonyms for this word, including "unhinged," "uncontrollable," "mad," "insane," and "frenzied." Other synonyms that can be used in place of "beserk" include "crazed," "maniacal," "violent," "lunatic," "rabid," and "deranged." All of these words emphasize the loss of control and the intensity of emotions. It is important to note that when using these words, they should be used with discretion and sensitivity, as they may have negative connotations and can be easily misinterpreted.