pleomorphism vs biological science

pleomorphism and biological science both are nouns.

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

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