headcounter vs canvasser

headcounter and canvasser both are nouns.

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

As nouns, headcounter and canvasser are synonyms defined as:

headcounter and canvasser: someone who conducts surveys of public opinion

Other synonyms of headcounter include poll taker, pollster.

headcounter (noun)	canvasser (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