alimentary canal vs alimentary tract

alimentary canal and alimentary tract both are nouns.

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

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

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

alimentary canal (noun)	alimentary 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