Synonyms for presenteeism include illness presenteeism, workplace sickness, sick-at-work, sick presenteeism, work-related illness, working unwell, working-while-sick, on-the-job sickness, and occupational ill-health. All these terms refer to the practice of employees coming to work when they're not fully fit, either physically or mentally. When employees do this, they are unable to perform at their optimal level, which means that they may be inefficient and unproductive while on the job. This can also lead to an increase in errors, accidents, and workplace incidents. Ultimately, presenteeism can negatively impact both the employee's health and the overall productivity of the organization.