"Jejune health" is a term used to describe a state of health that is lacking in nourishment, vitality, or vigor. There are several synonyms that can be used to describe this state of health. Some examples include feeble health, fragile health, weak health, frail health, and delicate health. All of these terms suggest a state of health that is not robust or sturdy. Other synonyms for "jejune health" might include undernourished, anemic, debilitated, infirm, or enervated. These synonyms can help writers and speakers convey a more precise or nuanced message about someone's overall health and well-being.