direct current vs direct electric current

direct current and direct electric current both are nouns.

Word	Noun	Adjective	Verb	Adverb
direct current	Yes	No	No	No
direct electric current	Yes	No	No	No

As nouns, direct current and direct electric current are synonyms defined as:

direct current and direct electric current: an electric current that flows in one direction steadily

Other synonyms of direct current include DC.

direct current (noun)	direct electric current (noun)
an electric current that flows in one direction steadily	an electric current that flows in one direction steadily