canvasser vs poll taker

canvasser and poll taker both are nouns.

Word	Noun	Adjective	Verb	Adverb
canvasser	Yes	No	No	No
poll taker	Yes	No	No	No

As nouns, canvasser and poll taker are synonyms defined as:

canvasser and poll taker: someone who conducts surveys of public opinion

Other synonyms of canvasser include headcounter, pollster.

canvasser (noun)	poll taker (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