physical therapy vs therapy

physical therapy and therapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
physical therapy	Yes	No	No	No
therapy	Yes	No	No	No

As nouns, therapy is a hypernym of physical therapy; that is, therapy is a word with a broader meaning than physical therapy:

physical therapy: therapy that uses physical agents: exercise and massage and other modalities
therapy: (medicine) the act of caring for someone (as by medication or remedial training etc.)

Other hypernyms of physical therapy include treatment.

physical therapy (noun)	therapy (noun)
therapy that uses physical agents: exercise and massage and other modalities	(medicine) the act of caring for someone (as by medication or remedial training etc.)