GI tract vs digestive tract

GI tract and digestive tract both are nouns.

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

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

GI tract and digestive 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 GI tract include alimentary canal, alimentary tract, digestive tube, gastrointestinal tract.

GI tract (noun)	digestive 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