shigellosis vs bacillary dysentery

shigellosis and bacillary dysentery both are nouns.

Word	Noun	Adjective	Verb	Adverb
shigellosis	Yes	No	No	No
bacillary dysentery	Yes	No	No	No

As nouns, shigellosis and bacillary dysentery are synonyms defined as:

shigellosis and bacillary dysentery: an acute infection of the intestine by shigella bacteria; characterized by diarrhea and fever and abdominal pains

shigellosis (noun)	bacillary dysentery (noun)
an acute infection of the intestine by shigella bacteria; characterized by diarrhea and fever and abdominal pains	an acute infection of the intestine by shigella bacteria; characterized by diarrhea and fever and abdominal pains