Agrypnotic refers to something that helps in staying awake or keeping one's eyes open. There are several synonyms for the term agrypnotic, which includes wakefulness-promoting agents, stimulants, energizers, and alertness agents. These synonyms are mostly used in the medical field to describe drugs, medications, or substances that can help in enhancing alertness, wakefulness, and energy levels. Some of the most commonly used agrypnotic agents include caffeine, amphetamines, modafinil, armodafinil, and eugeroics. While these agents are available in various forms, caution should be exercised when using them as they can result in unpleasant side effects such as insomnia, restlessness, anxiety, and addiction.