ventricular vs ventricle

ventricular is not a noun while ventricle is a noun.

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

ventricular (noun)	ventricle (noun)
	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

ventricular (adjective)	ventricle (adjective)
of or relating to a ventricle (of the heart or brain)