tollkeeper vs toll agent

tollkeeper and toll agent both are nouns.

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

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

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

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