Lyme disease vs zoonosis

Lyme disease and zoonosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lyme disease	Yes	No	No	No
zoonosis	Yes	No	No	No

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

Lyme disease: an acute inflammatory disease characterized by a rash with joint swelling and fever; caused by bacteria carried by the bite of a deer tick
zoonosis: an animal disease that can be transmitted to humans

Other hypernyms of Lyme disease include zoonotic disease.

Lyme disease (noun)	zoonosis (noun)
an acute inflammatory disease characterized by a rash with joint swelling and fever; caused by bacteria carried by the bite of a deer tick	an animal disease that can be transmitted to humans