Great Depression vs Depression

Great Depression and Depression both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Depression	Yes	No	No	No
Depression	Yes	No	No	No

As nouns, Great Depression and Depression are synonyms defined as:

Great Depression and Depression: a period during the 1930s when there was a worldwide economic depression and mass unemployment

Great Depression (noun)	Depression (noun)
the economic crisis beginning with the stock market crash in 1929 and continuing through the 1930s	a period during the 1930s when there was a worldwide economic depression and mass unemployment
a period during the 1930s when there was a worldwide economic depression and mass unemployment