prosecuting officer vs prosecutor

prosecuting officer and prosecutor both are nouns.

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

As nouns, prosecuting officer and prosecutor are synonyms defined as:

prosecuting officer and prosecutor: a government official who conducts criminal prosecutions on behalf of the state

Other synonyms of prosecuting officer include prosecuting attorney, public prosecutor.

prosecuting officer (noun)	prosecutor (noun)
a government official who conducts criminal prosecutions on behalf of the state	a government official who conducts criminal prosecutions on behalf of the state