sessile vs biology

sessile is not a noun while biology is a noun.

Word	Noun	Adjective	Verb	Adverb
sessile	No	Yes	No	No
biology	Yes	No	No	No

sessile (noun)	biology (noun)
	the science that studies living organisms
	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms

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