massager vs physiotherapist

massager and physiotherapist both are nouns.

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

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

massager: someone who rubs or kneads parts of the body to stimulate circulation and promote relaxation
physiotherapist: therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder

Other hypernyms of massager include physical therapist.

massager (noun)	physiotherapist (noun)
someone who rubs or kneads parts of the body to stimulate circulation and promote relaxation	therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder