public prosecutor vs attorney

public prosecutor and attorney both are nouns.

Word	Noun	Adjective	Verb	Adverb
public prosecutor	Yes	No	No	No
attorney	Yes	No	No	No

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

public prosecutor: 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 public prosecutor include lawyer, functionary, official.

public prosecutor (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