When referring to a group of people who are observing or watching a particular event or situation, there are a variety of synonyms that can be used in place of the term "lookers on." Some of these alternative phrases include "spectators," "observers," "onlookers," "witnesses," "viewers," and "watchers." Each of these terms portrays a slightly different connotation, with "spectators" implying a formal setting like a sporting event or theater performance, while "observers" suggest a more analytical or scientific perspective. "Onlookers" and "witnesses" are more commonly used to describe those who witness an accident or crime, while "viewers" and "watchers" would be used for more passive or media-related situations.