Synonyms for Poster (same or very similar meaning)
WordNet sense 1 (someone who pastes up bills or placards on walls or billboards):
bill poster, bill sticker
WordNet sense 2 (a sign posted in a public place as an advertisement):
bill, card, notice, placard, posting
WordNet sense 3 (a horse kept at an inn or post house for use by mail carriers or for rent to travelers):
post horse, post-horse
From the ODE community, based on WordNet
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