pollster vs headcounter

pollster and headcounter both are nouns.

Word	Noun	Adjective	Verb	Adverb
pollster	Yes	No	No	No
headcounter	Yes	No	No	No

As nouns, pollster and headcounter are synonyms defined as:

pollster and headcounter: someone who conducts surveys of public opinion

Other synonyms of pollster include canvasser, poll taker.

pollster (noun)	headcounter (noun)
someone who conducts surveys of public opinion	someone who conducts surveys of public opinion