gastrointestinal disorder vs food poisoning

gastrointestinal disorder and food poisoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
gastrointestinal disorder	Yes	No	No	No
food poisoning	Yes	No	No	No

As nouns, gastrointestinal disorder and food poisoning are synonyms defined as:

gastrointestinal disorder and food poisoning: illness caused by poisonous or contaminated food

gastrointestinal disorder (noun)	food poisoning (noun)
illness caused by poisonous or contaminated food	illness caused by poisonous or contaminated food