retrorse vs biological science

retrorse is not a noun while biological science is a noun.

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

retrorse (noun)	biological science (noun)
	the science that studies living organisms

retrorse (adjective)	biological science (adjective)
bent or curved backward or downward