biological science vs pleomorphism

biological science and pleomorphism both are nouns.

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

biological science (noun)	pleomorphism (noun)
the science that studies living organisms	(biology) the appearance of two or more distinctly different forms in the life cycle of some organisms
	(chemistry) the existence of different kinds of crystal of the same chemical compound