digestive tract vs gastrointestinal tract

digestive tract and gastrointestinal tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
digestive tract	Yes	No	No	No
gastrointestinal tract	Yes	No	No	No

As nouns, digestive tract and gastrointestinal tract are synonyms defined as:

digestive tract and gastrointestinal tract: tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination

Other synonyms of digestive tract include alimentary canal, alimentary tract, digestive tube, GI tract.

digestive tract (noun)	gastrointestinal tract (noun)
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination	tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination