sessile vs biological science

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

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

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

sessile (adjective)	biological science (adjective)
attached directly by the base; not having an intervening stalk
permanently attached to a substrate; not free to move about