physiotherapist vs healer

physiotherapist and healer both are nouns.

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

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

physiotherapist: therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder
healer: a person skilled in a particular type of therapy

Other hypernyms of physiotherapist include therapist.

physiotherapist (noun)	healer (noun)
therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder	a person skilled in a particular type of therapy