biological science vs subspecies

biological science and subspecies both are nouns.

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

biological science (noun)	subspecies (noun)
the science that studies living organisms	(biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species