electronic instrument vs electronic musical instrument

electronic instrument and electronic musical instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic instrument	Yes	No	No	No
electronic musical instrument	Yes	No	No	No

As nouns, electronic instrument and electronic musical instrument are synonyms defined as:

electronic instrument and electronic musical instrument: a musical instrument that generates sounds electronically

electronic instrument (noun)	electronic musical instrument (noun)
a musical instrument that generates sounds electronically	a musical instrument that generates sounds electronically