depression vs depress

depression is a noun but depress is not a noun.

Word	Noun	Adjective	Verb	Adverb
depression	Yes	No	No	No
depress	No	No	Yes	No

depression (noun)	depress (noun)
pushing down
sad feelings of gloom and inadequacy
a sunken or depressed geological formation
angular distance below the horizon (especially of a celestial object)
a concavity in a surface produced by pressing
a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity
an air mass of lower pressure; often brings precipitation
a long-term economic state characterized by unemployment and low prices and low levels of trade and investment
a state of depression and anhedonia so severe as to require clinical intervention

depression (verb)	depress (verb)
	lessen the activity or force of
	press down
	cause to drop or sink
	lower someone's spirits; make downhearted
	lower (prices or markets)