internal revenue agent vs tax collector

internal revenue agent and tax collector both are nouns.

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

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

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

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

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