alimentary tract vs GI tract

alimentary tract and GI tract both are nouns.

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

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

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

alimentary tract (noun)	GI 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