internal revenue agent vs collector of internal revenue

internal revenue agent and collector of internal revenue both are nouns.

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

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

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

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

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