massager vs physical therapist

massager and physical therapist both are nouns.

Word	Noun	Adjective	Verb	Adverb
massager	Yes	No	No	No
physical therapist	Yes	No	No	No

As nouns, physical therapist is a hypernym of massager; that is, physical therapist 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
physical therapist: therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder

Other hypernyms of massager include physiotherapist.

massager (noun)	physical therapist (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