ecological vs biology

ecological is not a noun while biology is a noun.

Word	Noun	Adjective	Verb	Adverb
ecological	No	Yes	No	No
biology	Yes	No	No	No

ecological (noun)	biology (noun)
	the science that studies living organisms
	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms

ecological (adjective)	biology (adjective)
of or relating to the science of ecology
characterized by the interdependence of living organisms in an environment