alternating current vs alternating electric current

alternating current and alternating electric current both are nouns.

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

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

alternating current and alternating electric current: an electric current that reverses direction sinusoidally

Other synonyms of alternating current include AC.

alternating current (noun)	alternating electric current (noun)
an electric current that reverses direction sinusoidally	an electric current that reverses direction sinusoidally