digestive tube vs alimentary canal

digestive tube and alimentary canal both are nouns.

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

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

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

digestive tube (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