Scrabble Dictionary

Check if your word is playable in Scrabble.

Yes, coaster is playable

...and is worth 10 points.

Found in the following dictionaries

Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Coaster" Definition

noun

A resident of a coastal region.
A roller coaster.
A sled or toboggan.
A small mat or plate placed under a vessel to protect a tabletop or other surface beneath.
A small tray, often on wheels, for passing something, such as a wine decanter, around a table.