leptospirosis vs swamp fever

leptospirosis and swamp fever both are nouns.

Word	Noun	Adjective	Verb	Adverb
leptospirosis	Yes	No	No	No
swamp fever	Yes	No	No	No

As nouns, leptospirosis and swamp fever are synonyms defined as:

leptospirosis and swamp fever: an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever

leptospirosis (noun)	swamp fever (noun)
an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever	an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever