astomatous vs biological science

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

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

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

astomatous (adjective)	biological science (adjective)
having no mouth or mouthlike opening