ticket agent vs booking clerk

ticket agent and booking clerk both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticket agent	Yes	No	No	No
booking clerk	Yes	No	No	No

As nouns, ticket agent and booking clerk are synonyms defined as:

ticket agent and booking clerk: someone who sells tickets (e.g., theater seats or travel accommodations)

ticket agent (noun)	booking clerk (noun)
someone who sells tickets (e.g., theater seats or travel accommodations)	someone who sells tickets (e.g., theater seats or travel accommodations)