biology vs commensal

biology and commensal both are nouns.

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

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

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