biology vs rudimentary

biology is a noun but rudimentary is not a noun.

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

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