chemical science vs polymorphous

chemical science is a noun but polymorphous is not a noun.

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

chemical science (noun)	polymorphous (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical science (adjective)	polymorphous (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