bionomical vs biological science

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

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

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

bionomical (adjective)	biological science (adjective)
of or relating to the science of ecology