We don't have synonyms for lymphatism yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lymphatic, lymphatics and symphytism.
(n) :
(medicine, historical) Enlargement or swelling of the lymphatic tissue, associated in the past with sudden death of children but no longer considered to be an authentic ailment.
(n) :
(medicine, historical) Enlargement or swelling of the lymphatic tissue, associated in the past with sudden death of children but no longer considered to be an authentic ailment.