drooping vs biology

drooping is not a noun while biology is a noun.

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

drooping (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

drooping (adjective)	biology (adjective)
hanging down (as from exhaustion or weakness)
weak from exhaustion
having branches or flower heads that bend downward