digestive tract vs alimentary canal

digestive tract and alimentary canal both are nouns.

Word	Noun	Adjective	Verb	Adverb
digestive tract	Yes	No	No	No
alimentary canal	Yes	No	No	No

As nouns, digestive tract and alimentary canal are synonyms defined as:

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

digestive tract (noun)	alimentary canal (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