polymorphous vs biological science

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

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

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

polymorphous (adjective)	biological science (adjective)
relating to the occurrence of more than one kind of individual (independent of sexual differences) in an interbreeding population
relating to the crystallization of a compound in two or more different forms
having or occurring in several distinct forms