ventricle vs heart ventricle

ventricle and heart ventricle both are nouns.

Word	Noun	Adjective	Verb	Adverb
ventricle	Yes	No	No	No
heart ventricle	Yes	No	No	No

As nouns, ventricle and heart ventricle are synonyms defined as:

ventricle and heart ventricle: a chamber of the heart that receives blood from an atrium and pumps it to the arteries

ventricle (noun)	heart ventricle (noun)
a chamber of the heart that receives blood from an atrium and pumps it to the arteries	a chamber of the heart that receives blood from an atrium and pumps it to the arteries
one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid