tax collector vs internal revenue agent

tax collector and internal revenue agent both are nouns.

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

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

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

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

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