ventricle vs ventricular

ventricle is a noun but ventricular is not a noun.

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

ventricle (noun)	ventricular (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

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