systematic vs biology

systematic is not a noun while biology is a noun.

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

systematic (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

systematic (adjective)	biology (adjective)
characterized by order and planning
of or relating to taxonomy