biology vs bilaterally symmetrical

biology is a noun but bilaterally symmetrical is not a noun.

Word	Noun	Adjective	Verb	Adverb
biology	Yes	No	No	No
bilaterally symmetrical	No	Yes	No	No

biology (noun)	bilaterally symmetrical (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)	bilaterally symmetrical (adjective)
	capable of division into symmetrical halves by only one longitudinal plane passing through the axis
	having identical parts on each side of an axis