gastrointestinal system vs systema alimentarium

gastrointestinal system and systema alimentarium both are nouns.

Word	Noun	Adjective	Verb	Adverb
gastrointestinal system	Yes	No	No	No
systema alimentarium	Yes	No	No	No

As nouns, gastrointestinal system and systema alimentarium are synonyms defined as:

gastrointestinal system and systema alimentarium: the system that makes food absorbable into the body

Other synonyms of gastrointestinal system include digestive system, systema digestorium.

gastrointestinal system (noun)	systema alimentarium (noun)
the system that makes food absorbable into the body	the system that makes food absorbable into the body