commensal vs biology

commensal and biology both are nouns.

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

commensal (noun)	biology (noun)
either of two different animal or plant species living in close association but not interdependent	the science that studies living organisms
	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms

commensal (adjective)	biology (adjective)
living in a state of commensalism