bibliopole vs monger

bibliopole and monger both are nouns.

Word	Noun	Adjective	Verb	Adverb
bibliopole	Yes	No	No	No
monger	Yes	No	Yes	No

As nouns, monger is a hypernym of bibliopole; that is, monger is a word with a broader meaning than bibliopole:

bibliopole: a dealer in secondhand books (especially rare or curious books)
monger: someone who purchases and maintains an inventory of goods to be sold

Other hypernyms of bibliopole include bargainer, dealer, trader.

bibliopole (noun)	monger (noun)
a dealer in secondhand books (especially rare or curious books)	someone who purchases and maintains an inventory of goods to be sold

bibliopole (verb)	monger (verb)
	sell or offer for sale from place to place