booking clerk vs vender

booking clerk and vender both are nouns.

Word	Noun	Adjective	Verb	Adverb
booking clerk	Yes	No	No	No
vender	Yes	No	No	No

As nouns, vender is a hypernym of booking clerk; that is, vender is a word with a broader meaning than booking clerk:

booking clerk: someone who sells tickets (e.g., theater seats or travel accommodations)
vender: someone who promotes or exchanges goods or services for money

Other hypernyms of booking clerk include marketer, seller, trafficker, vendor.

booking clerk (noun)	vender (noun)
someone who sells tickets (e.g., theater seats or travel accommodations)	someone who promotes or exchanges goods or services for money