nocturnal vs biological science

nocturnal is not a noun while biological science is a noun.

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

nocturnal (noun)	biological science (noun)
	the science that studies living organisms

nocturnal (adjective)	biological science (adjective)
belonging to or active during the night
of or relating to or occurring in the night