prosecuting officer vs attorney

prosecuting officer and attorney both are nouns.

Word	Noun	Adjective	Verb	Adverb
prosecuting officer	Yes	No	No	No
attorney	Yes	No	No	No

As nouns, attorney is a hypernym of prosecuting officer; that is, attorney is a word with a broader meaning than prosecuting officer:

prosecuting officer: a government official who conducts criminal prosecutions on behalf of the state
attorney: a professional person authorized to practice law; conducts lawsuits or gives legal advice

Other hypernyms of prosecuting officer include lawyer, functionary, official.

prosecuting officer (noun)	attorney (noun)
a government official who conducts criminal prosecutions on behalf of the state	a professional person authorized to practice law; conducts lawsuits or gives legal advice