toller vs toll collector

toller and toll collector both are nouns.

Word	Noun	Adjective	Verb	Adverb
toller	Yes	No	No	No
toll collector	Yes	No	No	No

As nouns, toller and toll collector are synonyms defined as:

Other synonyms of toller include toll agent, toll taker, tollgatherer, tollkeeper, tollman.

toller (noun)	toll collector (noun)
someone employed to collect tolls	someone employed to collect tolls
a person who rings church bells (as for summoning the congregation)