biological science vs abaxial

biological science is a noun but abaxial is not a noun.

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

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

biological science (adjective)	abaxial (adjective)
	facing away from the axis of an organ or organism