bilaterally symmetrical vs biological science

bilaterally symmetrical is not a noun while biological science is a noun.

Word	Noun	Adjective	Verb	Adverb
bilaterally symmetrical	No	Yes	No	No
biological science	Yes	No	No	No

bilaterally symmetrical (noun)	biological science (noun)
	the science that studies living organisms

bilaterally symmetrical (adjective)	biological science (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