Hypersomnolence is a medical term that refers to excessive daytime sleepiness or prolonged nighttime sleep. If you are looking for synonyms for hypersomnolence, there are several options to choose from. These include terms such as excessive sleepiness, somnolence, drowsiness, lethargy, fatigue, and sleepiness. Other synonyms that can be used for hypersomnolence include heavy eyelids, grogginess, slumberousness, torpor, and the desire to sleep. It is important to note that while these terms are similar in meaning to hypersomnolence, they may not necessarily be interchangeable. Depending on the context, certain synonyms may be more appropriate than others.