gizzard vs ventriculus

gizzard and ventriculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
gizzard	Yes	No	No	No
ventriculus	Yes	No	No	No

As nouns, gizzard and ventriculus are synonyms defined as:

gizzard and ventriculus: thick-walled muscular pouch below the crop in many birds and reptiles for grinding food

Other synonyms of gizzard include gastric mill.

gizzard (noun)	ventriculus (noun)
thick-walled muscular pouch below the crop in many birds and reptiles for grinding food	thick-walled muscular pouch below the crop in many birds and reptiles for grinding food