poll vs tonsure

poll and tonsure both are nouns.

Word	Noun	Adjective	Verb	Adverb
poll	Yes	No	Yes	No
tonsure	Yes	No	Yes	No

As nouns, tonsure is a hyponym of poll; that is, tonsure is a word with a more specific, narrower meaning than poll:

poll (noun)	tonsure (noun)
the counting of votes (as in an election)	shaving the crown of the head by priests or members of a monastic order
the top of the head	the shaved crown of a monk's or priest's head
the part of the head between the ears
an inquiry into public opinion conducted by interviewing a random sample of people
a tame parrot

poll (verb)	tonsure (verb)
convert into a pollard	shave the head of a newly inducted monk
get the opinions (of people) by asking specific questions
vote in an election at a polling station
get the votes of