spirillum fever vs sodoku

spirillum fever and sodoku both are nouns.

Word	Noun	Adjective	Verb	Adverb
spirillum fever	Yes	No	No	No
sodoku	Yes	No	No	No

As nouns, spirillum fever and sodoku are synonyms defined as:

spirillum fever and sodoku: the form of ratbite fever occurring in the Far East

spirillum fever (noun)	sodoku (noun)
the form of ratbite fever occurring in the Far East	the form of ratbite fever occurring in the Far East