opinion poll vs public opinion poll

opinion poll and public opinion poll both are nouns.

Word	Noun	Adjective	Verb	Adverb
opinion poll	Yes	No	No	No
public opinion poll	Yes	No	No	No

As nouns, opinion poll and public opinion poll are synonyms defined as:

opinion poll and public opinion poll: an inquiry into public opinion conducted by interviewing a random sample of people

Other synonyms of opinion poll include canvass, poll.

opinion poll (noun)	public opinion poll (noun)
an inquiry into public opinion conducted by interviewing a random sample of people	an inquiry into public opinion conducted by interviewing a random sample of people