dysentery vs infectious disease

dysentery and infectious disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
dysentery	Yes	No	No	No
infectious disease	Yes	No	No	No

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

dysentery: an infection of the intestines marked by severe diarrhea
infectious disease: a disease transmitted only by a specific kind of contact

dysentery (noun)	infectious disease (noun)
an infection of the intestines marked by severe diarrhea	a disease transmitted only by a specific kind of contact