biological science vs cell doctrine

biological science and cell doctrine both are nouns.

Word	Noun	Adjective	Verb	Adverb
biological science	Yes	No	No	No
cell doctrine	Yes	No	No	No

biological science (noun)	cell doctrine (noun)
the science that studies living organisms	(biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schleiden and by Theodor Schwann