obturator vs prosthetic device

obturator and prosthetic device both are nouns.

Word	Noun	Adjective	Verb	Adverb
obturator	Yes	No	No	No
prosthetic device	Yes	No	No	No

As nouns, prosthetic device is a hypernym of obturator; that is, prosthetic device is a word with a broader meaning than obturator:

obturator: a prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate)
prosthetic device: corrective consisting of a replacement for a part of the body

Other hypernyms of obturator include prosthesis.

obturator (noun)	prosthetic device (noun)
a prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate)	corrective consisting of a replacement for a part of the body