electronic bike vs E-bike

electronic bike and E-bike both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic bike	Yes	No	No	No
E-bike	Yes	No	No	No

As nouns, electronic bike and E-bike are synonyms defined as:

electronic bike and E-bike: a bicycle that is built with a motor, the bicycle can be powered by the motor or pedalling of the cyclist

Other synonyms of electronic bike include electronic bicycle.

electronic bike (noun)	E-bike (noun)
a bicycle that is built with a motor, the bicycle can be powered by the motor or pedalling of the cyclist	a bicycle that is built with a motor, the bicycle can be powered by the motor or pedalling of the cyclist