biological science vs pendulous

biological science is a noun but pendulous is not a noun.

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

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

biological science (adjective)	pendulous (adjective)
	having branches or flower heads that bend downward