iontophoresis vs therapy

iontophoresis and therapy both are nouns.

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

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

iontophoresis: therapy that uses a local electric current to introduce the ions of a medicine into the tissues
therapy: (medicine) the act of caring for someone (as by medication or remedial training etc.)

Other hypernyms of iontophoresis include treatment.

iontophoresis (noun)	therapy (noun)
therapy that uses a local electric current to introduce the ions of a medicine into the tissues	(medicine) the act of caring for someone (as by medication or remedial training etc.)