direct electric current vs direct current

direct electric current and direct current both are nouns.

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

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

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

Other synonyms of direct electric current include DC.

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