poster

(noun) a sign posted in a public place as an advertisement. Synonyms: posting, placard, notice, bill, card. Example: "A poster advertised the coming attractions."

(noun) someone who pastes up bills or placards on walls or billboards. Synonyms: bill poster, bill sticker.

(noun) a horse kept at an inn or post house for use by mail carriers or for rent to travelers. Synonyms: post horse, post-horse.