We don't have synonyms for neurosthenia yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are neurasthenic and neurasthenia.
(n) :
(medicine, archaic) Strong reaction or overreaction of a nerve to a stimulus.
(n) :
(medicine, proscribed) Misconstruction of neurasthenia. [(psychiatry, dated) An ill-defined medical condition characterized by lassitude, fatigue, headache, and irritability, associated chiefly with emotional disturbance.]
(n) :
(medicine, archaic) Strong reaction or overreaction of a nerve to a stimulus.
(n) :
(medicine, proscribed) Misconstruction of neurasthenia. [(psychiatry, dated) An ill-defined medical condition characterized by lassitude, fatigue, headache, and irritability, associated chiefly with emotional disturbance.]