biology vs procreate

biology is a noun but procreate is not a noun.

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

biology (noun)	procreate (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 (verb)	procreate (verb)
	have offspring or produce more individuals of a given animal or plant