Deutschmark vs German mark

Deutschmark and German mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
Deutschmark	Yes	No	No	No
German mark	Yes	No	No	No

As nouns, Deutschmark and German mark are synonyms defined as:

Deutschmark and German mark: formerly the basic unit of money in Germany

Other synonyms of Deutschmark include Deutsche Mark, mark.

Deutschmark (noun)	German mark (noun)
formerly the basic unit of money in Germany	formerly the basic unit of money in Germany