Adynamia is a medical term used to describe a state of weakness or lack of strength. There are several synonyms that can be used to convey a similar meaning, including asthenia, fatigue, exhaustion, lethargy, and debility. Asthenia can refer to overall weakness or lack of energy, while fatigue specifically implies tiredness or weariness. Exhaustion indicates extreme weariness or fatigue, while lethargy suggests a lack of enthusiasm or activity. Debility refers to weakness caused by illness or injury. Depending on the context, any of these terms may be used to describe adynamia and its associated symptoms.