biological science vs nocturnal

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

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

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

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