gastrointestinal tract vs stomach

gastrointestinal tract and stomach both are nouns.

Word	Noun	Adjective	Verb	Adverb
gastrointestinal tract	Yes	No	No	No
stomach	Yes	No	Yes	No

gastrointestinal tract (noun)	stomach (noun)
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination	an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion
	the region of the body of a vertebrate between the thorax and the pelvis
	an appetite for food
	an inclination or liking for things involving conflict or difficulty or unpleasantness

gastrointestinal tract (verb)	stomach (verb)
	put up with something or somebody unpleasant
	bear to eat