depressed vs biological science

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

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

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

depressed (adjective)	biological science (adjective)
filled with melancholy and despondency
lower than previously
flattened downward as if pressed from above or flattened along the dorsal and ventral surfaces