bilaterally symmetrical vs biology

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

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

bilaterally symmetrical (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

bilaterally symmetrical (adjective)	biology (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