canvasser vs headcounter

canvasser and headcounter both are nouns.

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

As nouns, canvasser and headcounter are synonyms defined as:

canvasser and headcounter: someone who conducts surveys of public opinion

Other synonyms of canvasser include poll taker, pollster.

canvasser (noun)	headcounter (noun)
someone who conducts surveys of public opinion	someone who conducts surveys of public opinion
someone who examines votes at an election
a petitioner who solicits contributions or trade or votes
a person who takes or counts votes