biological science vs commensal

biological science and commensal both are nouns.

Word	Noun	Adjective	Verb	Adverb
biological science	Yes	No	No	No
commensal	Yes	Yes	No	No

biological science (noun)	commensal (noun)
the science that studies living organisms	either of two different animal or plant species living in close association but not interdependent

biological science (adjective)	commensal (adjective)
	living in a state of commensalism