tollkeeper vs toll collector

tollkeeper and toll collector both are nouns.

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

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

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

tollkeeper (noun)	toll collector (noun)
someone employed to collect tolls	someone employed to collect tolls