"Whatsisname" is a term often used when a person cannot remember someone's name. This phrase is typically used as a placeholder until the name is remembered. However, there are several synonyms for this term that could also be used in place of "whatsisname." Some possible alternatives include "so-and-so," "that guy," "that girl," "that person," or even "fellow." Additionally, some people may use a descriptive term to identify someone, such as "the blonde woman," "the tall man," or "the guy with the glasses." Ultimately, there are various ways to identify someone without using the term "whatsisname," and individuals can choose the most appropriate term based on the situation and personal preference.