depression vs dysphoria

depression and dysphoria both are nouns.

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

As nouns, dysphoria is a hyponym of depression; that is, dysphoria is a word with a more specific, narrower meaning than depression:

depression (noun)	dysphoria (noun)
pushing down	abnormal depression and discontent
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