vestigial vs biological science

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

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

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

vestigial (adjective)	biological science (adjective)
not fully developed in mature animals