If you've misspelled "poasters", fear not! The correct word you are looking for is "posters". Don't worry, it's a common typing error. Just make sure to double-check your spelling before you hit that publish button!
boasters I avoid spending time with boasters who only talk about their accomplishments without considering other people's feelings.
coasters I bought some new coasters to protect my table from water damage.
piasters In Vietnam, the official currency is Vietnamese dong, but some businesses may accept U.S. dollars or even piasters from the French colonial era.
plasters After cutting his finger while cooking, he applied several plasters to stop the bleeding.
posters The walls of his room were adorned with posters of his favorite band.
roasters The coffee shop had two large roasters to produce fresh coffee beans daily.
toasters I need to buy new toasters for my bed and breakfast.