rudimentary vs biological science

rudimentary is not a noun while biological science is a noun.

Word	Noun	Adjective	Verb	Adverb
rudimentary	No	Yes	No	No
biological science	Yes	No	No	No

rudimentary (noun)	biological science (noun)
	the science that studies living organisms

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