electrotherapist vs healer

electrotherapist and healer both are nouns.

Word	Noun	Adjective	Verb	Adverb
electrotherapist	Yes	No	No	No
healer	Yes	No	No	No

As nouns, healer is a hypernym of electrotherapist; that is, healer is a word with a broader meaning than electrotherapist:

electrotherapist: someone who specializes in the treatment of disease by electricity
healer: a person skilled in a particular type of therapy

Other hypernyms of electrotherapist include therapist.

electrotherapist (noun)	healer (noun)
someone who specializes in the treatment of disease by electricity	a person skilled in a particular type of therapy