epidemic pleurodynia vs epidemic myalgia

epidemic pleurodynia and epidemic myalgia both are nouns.

Word	Noun	Adjective	Verb	Adverb
epidemic pleurodynia	Yes	No	No	No
epidemic myalgia	Yes	No	No	No

As nouns, epidemic pleurodynia and epidemic myalgia are synonyms defined as:

epidemic pleurodynia and epidemic myalgia: an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)

Other synonyms of epidemic pleurodynia include Bornholm disease, diaphragmatic pleurisy, myosis.

epidemic pleurodynia (noun)	epidemic myalgia (noun)
an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)	an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)