collector of internal revenue vs tax collector

collector of internal revenue and tax collector both are nouns.

Word	Noun	Adjective	Verb	Adverb
collector of internal revenue	Yes	No	No	No
tax collector	Yes	No	No	No

As nouns, collector of internal revenue and tax collector are synonyms defined as:

collector of internal revenue and tax collector: someone who collects taxes for the government

Other synonyms of collector of internal revenue include exciseman, internal revenue agent, taxman.

collector of internal revenue (noun)	tax collector (noun)
someone who collects taxes for the government	someone who collects taxes for the government