depress vs depression

depress is not a noun while depression is a noun.

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

depress (noun)	depression (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

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