biology vs ventral

biology is a noun but ventral is not a noun.

Word	Noun	Adjective	Verb	Adverb
biology	Yes	No	No	No
ventral	No	Yes	No	No

biology (noun)	ventral (noun)
the science that studies living organisms
all the plant and animal life of a particular region
characteristic life processes and phenomena of living organisms

biology (adjective)	ventral (adjective)
	toward or on or near the belly (front of a primate or lower surface of a lower animal)
	nearest to or facing toward the axis of an organ or organism