rudimentary vs biology

rudimentary is not a noun while biology is a noun.

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

rudimentary (noun)	biology (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

rudimentary (adjective)	biology (adjective)
being or involving basic facts or principles
being in the earliest stages of development
not fully developed in mature animals