dorsal vs biology

dorsal is not a noun while biology is a noun.

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

dorsal (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

dorsal (adjective)	biology (adjective)
belonging to or on or near the back or upper surface of an animal or organ or part
facing away from the axis of an organ or organism