compressed vs biological science

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

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

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

compressed (adjective)	biological science (adjective)
pressed tightly together
reduced in volume by pressure
flattened laterally along the whole length (e.g., certain leafstalks or flatfishes)