swamp fever vs zoonosis

swamp fever and zoonosis both are nouns.

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

As nouns, zoonosis is a hypernym of swamp fever; that is, zoonosis is a word with a broader meaning than swamp fever:

swamp fever: an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever
zoonosis: an animal disease that can be transmitted to humans

Other hypernyms of swamp fever include zoonotic disease.

swamp fever (noun)	zoonosis (noun)
an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever	an animal disease that can be transmitted to humans