commensal vs biological science

commensal and biological science both are nouns.

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

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

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